E-123 Omega/History and appearances

Early life
Omega was created by Dr. Eggman as the 24th and last of the doctor's E-100 Series robots. He was designed by Eggman to prevent the release of Shadow the Hedgehog from his stasis, and, in this case, he failed to control Shadow when he was released. To accomplish this, Eggman sealed Omega in an abandoned base with Shadow. Being imprisoned infuriated Omega; he decided to prove his status as the most powerful E-Series robot by abandoning his original programming and taking revenge on his creator and all the other machines he built.

Sonic Heroes
Omega debuted in Sonic Heroes. When Rouge the Bat went searching for Eggman's secret treasure in his base, she accidentally reactivated Omega when she released Shadow from a stasis pod. Mistaking Shadow for an Eggman robot and following his new mission, Omega attempted to take out the hedgehog. However, Rouge broke up the fighting long enough to hear both their stories. He soon teamed up with Rouge and Shadow as the power member of Team Dark.

The three of them then started their search for Eggman at Seaside Hill and Ocean Palace before coming face-to-face with the Doctor himself (who was really Metal Sonic in disguise) in his Egg Hawk. After defeating it, they continued on to Grand Metropolis and afterward Power Plant, where they met with Team Chaotix. Rouge believed them to be rivals seeking Eggman's treasure, and a brief battle ensued. They then headed to Casino Park and Omega detected enemies two hundred meters ahead of them while Rouge was wondering about the Chaotix. They then went to Bingo Highway and finally met up with "Eggman" again, who set an army of robots against them, but were defeated by Team Dark's combined efforts. Following "Eggman's" energy signature, Omega led them to his ground base passed Rail Canyon and through Bullet Station before confronting "Eggman" again in his Egg Albatross and Egg Hawk combined. They defeated both and discovered that the Eggman they fought appeared to be a dummy that issued a recorded laughing, which angered Omega. The automaton then watched Shadow when he discovered a robot in his likeness before the ultimate life form ordered them to move and they proceeded to Frog Forest. After trekking through Lost Jungle, they came across Team Sonic, who were also looking for Eggman, and a fight ensued. Once this was over, Omega led them to Hang Castle on the search for Eggman and through Mystic Mansion. After they escaped the castle, "Eggman" appeared again, but Omega was unable to tell if it was really him or not due to his sensors being jammed. After defeating an even larger army of robots, Team Dark made its way on to the Egg Fleet and finally arrived on Final Fortress. After getting passed the ship's forces, they battled "Eggman" in his Egg Emperor and won, causing multiple explosions to course through the machine. After deeming "Eggman" eradicated, Omega then set about destroying a room full of Shadow Androids. Rouge had just entered looking for the Doctor's treasure. The bat then told Omega that Shadow, the one they knew, was a robot ("android" in the Japanese version), and before saying anything else, turned to leave. Then Omega said, with a slight sign of compassion, that in order for there to be clones the original must still exist.

He then accompanied Team Dark to a large tower on the ship in the shape of Eggman, and watched as it was destroyed and the parts used to turn Neo Metal Sonic into the Metal Overlord, though still largely incomplete. He then gathered around with the other three teams as the real Eggman explained that Metal Sonic copied all their data and combined it with the power of Chaos, saying it would help if they had the seven Chaos Emeralds. Fortunately, all four teams had collected the emeralds during their adventures, and Rouge and Omega revealed they had the grey and green Chaos Emeralds respectively. But Eggman still thought it a long shot, so Shadow told Team Sonic that he and everyone else would distract Metal Sonic long enough for them to induce a super transformation using the emeralds' power. After Team Rose and Team Chaotix attacked Metal Sonic from the right and left sides of him, Team Dark struck him from the front by assaulting his weak point that changed to repel the attacks of the three members at the right time. But, fortunately, through team work, they managed to weaken him before he grew wings and took off into the sky. Team Sonic then went into their super states and challenged the Metal Overlord and won. Neo Metal Sonic was then reverted back to his original form, and Omega picked up his deactivated body when everyone was gone and watched Team Sonic, Rouge and Amy Rose run off into the distance with Shadow.

Shadow the Hedgehog
Omega made his next appearance in Shadow the Hedgehog (2005), still with the sole intention of getting revenge on Eggman. He was given a new English voice actor from Webtone Productions (Jeff Kramer) (though originally cast to Maddie Blaustein of 4Kids Entertainment) while retaining his Japanese voice actor (Taiten Kusunoki). Optionally, Shadow can assist Omega in the "Hero" missions of the "Iron Jungle" and "Lava Shelter" stages by teaming up to get to Eggman and Omega will help him battle the "Egg Breaker" and "Egg Dealer" bosses following those stages. In Expert Mode, Omega spoke to Shadow on the "Mad Matrix" and "Lava Shelter" levels, also being some kind of comic relief in the latter, along with Rouge, and he was heard last giving support to Shadow on The Last Way along with every other main character in the game.

In the missions that Omega appears in, the player must either destroy the Egg Balloon ("Iron Jungle") or head to the center of Eggman's base ("Lava Shelter") to complete the "Hero" mission. Strangely, whether the player completes the "Hero" or "Dark" mission for "Lava Shelter", Omega will help Shadow fight the Egg Dealer, despite the "Dark" mission being helping Eggman. Omega is also playable by inserting a second controller, allowing the player to control him and use Omega to attack certain enemies within a limited distance. However, he doesn't use any weapons to attack and instead swipes at opponents with his hands or jumps on them.

Sonic the Hedgehog (2006)
Omega appeared in Sonic the Hedgehog (2006) with a prominent role in Shadow's story, this time voiced by Maddie Blaustein (by Taiten Kusunoki (mistakenly credited as "Taitem") in the Japanese version). His face is used on the "Dark Hero" achievement, which is earned by "meet[ing] all the requests with magnificent skill," or in other words, complete all Town Missions with an S Rank and is worth 50 Gamerscore.

Upon being sent to the future by Mephiles the Dark and after finding a Chaos Emerald, Shadow and Rouge found Omega in standby mode, abandoned along the ruins of Crisis City. And because they could not do anything to him they left him behind. Later in the story, Rouge went back to the present alone, where she looked and found Omega in the ruins of Tropical Jungle, (judging by the throngs of Eggman's robots, it can be reasonably speculated that Omega was in the area to destroy them). Rouge asked Omega to help Shadow out in the future, entrusting him with the green Chaos Emerald they'd found. Omega complied, and went into stand-by mode until the point in the future when Shadow was in trouble. Between then, Shadow was blamed for releasing Iblis by humanity, and, according to Mephiles, they reprogrammed Omega to hunt him down and seal Shadow within a technologically advanced cage. Omega carried out these orders and was then left within Crisis City's ruins until he was meant to help the past Shadow. When the moment finally arrived after waiting two centuries, Omega reactivated and helped Shadow in a fight against Mephiles just when he was in danger, after which Shadow and Omega went back to the present while chasing Mephiles through a time-warping sphere of energy. They met up with Rouge at Soleanna's docks and Shadow headed off to get answers about Mephiles from Dr. Eggman. Omega then went in pursuit of Mephiles himself while Rouge moved to Soleanna's Castle Town and was present when Shadow returned from the past.

Omega located Mephiles at position K31 in Wave Ocean and after getting passed obstacles and defeating numerous enemies, located Mephiles and proceeded to attack him. Mephiles teased Omega by saying that he was clearly made to capture Shadow judging by how easily he could defeat him, and showed knowledge of Omega's capture of Shadow. Before Mephiles revealed everything, Omega proceeded to unload his machine guns on Mephiles, and he disappeared in a black mist. Omega then revealed somewhat sadly to Shadow and Rouge that during his two hundred-year isolation he had been reprogrammed to capture Shadow due to humanity's fear of him and was the one who sealed him in his future prison.

The trio later chased Mephiles to a temple in Dusty Desert and Shadow and Omega navigated through it, trying to reach Mephiles before he could find the Chaos Emerald inside and merge back with Iblis to become Solaris, but they arrived too late. They had taken with them a new Scepter of Darkness and used it after defeating Mephiles, but failed to seal him in it because of his new form made through Shadow's shadow. After blasting all three members of Team Dark off their feet, Mephiles then used his powers, along with two Chaos Emeralds, to summon a clone army of himself. Before finishing them off, Mephiles reminded Shadow of humanity's betrayal against him in the future. Without hesitation, Shadow told him that if the world chose to become his enemy, that he would fight as he always had. Shadow then removed his power inhibitor rings and covered himself and his team in a huge amount of energy and defeated Mephiles and his clone army.

Afterward, Team Dark took view of their handiwork and Shadow attempted to take Mephiles' Chaos Emeralds, only for them to start glowing and transport them all off to a space-time rift created by the newly rectified Solaris along with Silver, Eggman, Tails, Knuckles, Amy, Princess Elise and Sonic's dead body. Everyone briefly grieved over Sonic's death. Knuckles said that they had to stop Solaris at once, but Eggman informed everyone that Solaris couldn't be defeated in this specific time, since it existed in the past, present and future. Silver suggested that they destroy Solaris all at once, but Shadow countered his argument, saying it was not possible without Sonic's help. Elise then felt Sonic's presence in the wind and Silver realized that they could use the Chaos Emeralds to resurrect him. Omega and the others then spread out over the distant corners of the rift to find the Chaos Emeralds and he traveled to Flame Core, where he found the green emerald near a lake of lava. Once all the Chaos Emeralds were collected, Sonic was revived with Elise's kiss and the power of the emeralds, transforming him into Super Sonic. He then gave this power to Shadow and Silver to transform into their Super States, and together the three hedgehogs defeated Solaris as Omega and the others watched them battle.

Omega is playable in the first boss battle against Mephiles, Wave Ocean, Dusty Desert and the End of the World stages. He is also playable in the various downloadable Very Hard Missions of Shadow's levels, including Kingdom Valley, Crisis City, Flame Core, Radical Train, Aquatic Base, and Dusty Desert. He is final playable character in the "Team Attack Amigo" DLC in the levels Dusty Desert, White Acropolis and finally fights against the Egg Genesis, the DLC's only boss.

Sonic Chronicles: The Dark Brotherhood
Omega is one of the eleven playable characters in Sonic Chronicles: The Dark Brotherhood for the Nintendo DS.

In the story, Omega went to Eggman's ruined city of Metropolis to destroy any robots he could find, but he located the Marauders instead. The Marauders had reprogrammed Eggman's old robots to serve them and, upon discovering Omega, sent them to take him apart after he had to make a retreat into a room in Northwest Metropolis. The robots were successful, but Shadow was worried about Omega and went in search of him using an old Eggman device that picked up the automaton's signal. After losing it, Shadow then teamed up with Sonic and company to help find Omega. He was found in Chapter 5 by Tails, Eggman and the rest of their team. Omega was repaired by the young fox at Shadow's request, much to the disapproval of the Doctor. When Omega saw Eggman his first inclination was to attack him, but Tails told Omega that they'd joined forces with Eggman. At first Omega thought Tails had gone mad and suggested destroying him, but Shadow and Rouge confirmed this for the robot. Trusting his friends more than Tails, Omega teamed up with Sonic after recharging himself in the stronghold in the Underground. Sonic Chronicles: The Dark Brotherhood (2008) [After they enter the room with Omega inside.] Shadow the Hedgehog: "Wait! That's Omega! I knew it! Those Marauder goons. We have to--" [Robots enter.] Miles "Tails" Prower: "Later! Someone's coming!" Shadow: "Good. I need to smash something." [...] Shadow: "Omega!" Doctor Eggman: "Oh, don't waste your time on this one. He's been a thorn in my side for years!" Shadow: "Quiet, Eggman, or I promise you I'll--" Tails: "He's still functioning! Just heavily damaged. But I think I can... Yes! With the parts from those guardian robots, I can repair him!" Shadow: "Do it." [...] Shadow: "Omega! Can you hear me?" E-123 Omega: "SYSTEMS COMING ONLINE -- E-123 OMEGA BEGINNING REACTIVATION PROTOCOL." Rouge the Bat: "If I had a nickel for every time I heard that..." E-123 Omega: "EGGMAN DETECTED. BEGINNING ANNIHILATION SEQUENCE." Tails: "No! Omega, Eggman is on our side!" E-123 Omega: "ORANGE FOREST CREATURE HAS GONE MAD. RECOMMEND IMMEDIATE DESTRUCTION." Shadow: "No, Omega. He's right. Eggman is helping Team Sonic against the Marauders." Rouge: "As hard as it is to believe." E-123 Omega: "THERE IS NO REASON TO DOUBT SHADOW OR ROUGE. THERE IS NO REASON TO TRUST THE REST OF THESE MEATBAGS." Tails: "What happened to you, Omega?" E-123 Omega: "I CAME HERE TO DESTROY ALL OTHER EGGMAN ROBOTS. BUT I WAS SURROUNDED BY STRANGE CREATURES AND FORCED TO FLEE. THE COWARDS FOLLOWED ME. THEY MADE THEIR ROBOTS DISMANTLE ME WHILE I WAS HELPLESS. DISASSEMBLED BY INFERIOR MACHINES. IT WAS EMBARRASSING." Shadow: "Come with us, Omega. We're going to destroy the Marauders for what they did to you." E-123 Omega: "YES. THEY WILL BE DESTROYED FOR WHAT THEY DID TO ME." Rouge: "Ugh. Again with the emotionless revenge. It just gets tired." Tails: "Let's go, team!" Eggman: "Yes. We have much work to do!" E-123 Omega: "I MUST TAKE TIME TO RECHARGE BEFORE COMMENCING REVENGE." Shadow: "The stronghold in the Underground, Omega. You can recharge there." Eggman: "I never agreed to allow that faulty machine to--" Shadow: "Silence, Eggman. Now." E-123 Omega: "I WILL GO TO THE UNDERGROUND TO RECHARGE. YOU WILL FIND ME THERE IF YOU NEED ME." Shadow: "We'll get the Marauders for what they did to you, my friend. Let's get to it. The Marauders must pay."

Omega is an optional character and his stripe was returned to his pre-2006 color, but now both of his shoulders have a "Ω" symbol. His main combat move was firing missiles at his enemies which could effect nearby opponents along with the main target when they struck. In combat, Omega had the highest damage power, and the highest armor, but was also one of the slowest and therefore only got one attack per round. He (optionally) provides most of the end credits for Sonic Chronicles, along with Tails and Sonic. Omega also has his own wallpaper which shows Metropolis in the background.

Sonic Colors
Omega appears briefly in the Nintendo DS version of Sonic Colors, voiced again by Taiten Kusunoki in Japanese and by Vic Mignogna for the first time in English after almost the entire 4Kids cast was replaced.

Omega appears in the Asteroid Coaster area of Dr. Eggman's Amazing Interstellar Amusement Park as the area's first mission, confronting Cubot and Orbot. He repeatedly opens fire on them with his laser cannons, the two henchmen thinking him one of Eggman's robots going through a "rebellious teen phase." When Omega discovers they are Eggman's henchmen and they realize he is going to destroy them, they plead with Sonic to save them, since he saves everyone else. Sonic tells Omega to stand down, but he only agrees on the condition he gives him physical specification data by completing a mission to collect five Wisps carrying numbered flags in the correct order within a minute and thirty seconds. Sonic met his conditions and Omega revealed he would use the data for a function upgrade in the future. Sonic then asked Omega if he saw where Cubot and Orbot went, and a visually sad Omega admitted he had lost them. Tails then jokingly said he should be mining data from the two henchmen due to their track record for lightning-fast escapes. Omega makes a later appearance in Asteroid Coaster alongside Shadow, wanting Sonic and Tails to chase after a secret amusement park ride of Eggman's to locate what it led to on another mission. They arrive at a lab and Tails hacks into the computer system, locating the results of an experiment called Project "Mother". Shadow was disappointed they didn't find more to help, but Sonic just focused on the fact that it was useful all the same before speeding off. Omega then asked why Shadow gave Sonic information, and the ultimate life form replied he was just happy to let Sonic do all the racing around. Omega found this hard to understand since Shadow and Sonic's abilities were equal according to his data and Shadow just replied that data would not tell him everything, leaving the automaton stumped.

Sonic Forces
In Sonic Forces, Omega was tasked by Rouge to infiltrate one of Eggman's bases as part of Team Dark's reconnaissance mission. Believing he could handle the mission alone however, Omega proceeded to conduct wanton slaughter of various Egg Pawns while invading the base, despite Rouge telling him not engage the enemy, and at least wait for Shadow to arrive. This resulted in Eggman sending out Infinite to deal with him. Upon encountering Infinite, Omega told him that anyone in the way of his objective of defeating Eggman would get killed. Infinite, undaunted, proceeded to defeat him in a flash, causing Omega to lose all contact with his teammates.

Six months later, Omega was found by Tails, who tried his best to repair him in the City. However, the fox cub could not get very far, especially after he was interrupted by a Chaos replica and Classic Sonic.

Much later, Omega, now fully repaired and operational, arrived slightly later then the rest of the Resistance after they launched an attack on Eggman's Eggman Empire Fortress. During the attack, Omega appeared and attacked Infinite just as he was about to exterminate the Resistance's core members, swearing revenge. It was then, however, that Infinite launched the plan meant to ensure the Eggman Empire's ultimate victory: using his Phantom Ruby prototype, Infinite got ready to drop a sun on the Resistance and kill them all. Fortunately, the Avatar was able to neutralize Infinite's sun in the last second using a Phantom Ruby prototype. Omega and the rest then focused on battling the Phantom Ruby replicas defending the Eggman Empire Fortress while Sonic and the Avatar destroyed Infinite and the Phantom Rubies' reactor. Eggman, however, had foreseen this and his used his original Phantom Ruby in conjunction with his Death Egg Robot to create thousands of replicas to overwhelm Omega and the rest with. Fortunately, Sonic, the Avatar and Classic Sonic beat Eggman and destroyed his robot, which made the replica army vanish and left the Resistance as the victors.

After watching Classic Sonic return to his world now that the Phantom Ruby was gone, Omega set out with Sonic to rid the world of all traces of Eggman's reign. At a last meeting in the Resistance HQ, Knuckles disbanded the Resistance as the Avatar announced their departure. Omega then responded to Rouge's complaint, which reminded him of waiting with relief only at the end of the fight. The group then agreed with Tails that even though they were going back to their old lives, they would be friends forever and keep working together to restore the world.

Sonic Battle
Omega is briefly mentioned by Rouge during Sonic Battle, when she notes the similarities between him and E-102 Chaos Gamma after defeating him.

Sonic Gems Collection
Omega's artwork and screenshots from Sonic Heroes can be seen in the "museum" of Sonic Gems Collection and Sonic Mega Collection Plus.

Sonic Rival series
Omega appears on two collectable cards in Sonic Rivals and Sonic Rivals 2, namely the "E-123 Omega 2006" card and the "Team Dark 2003" card.

Super Smash Bros. Brawl
Im Super Smash Bros. Brawl, Omega as a collectable Sticker:

Super Smash Bros. for Nintendo 3DS
Omega is featured as a collectible Trophy in Super Smash Bros. for Nintendo 3DS:

Sonic Unleashed
During Skyscraper Scamper in the Xbox 360 and PS3 versions of Sonic Unleashed, players can see street signs with the names Shadow Ave, Rouge St, E-123 Omega Rd, Silver Beach, West Park, Chao Garden and Blaze Rd.

Mario & Sonic at the Olympic Games
According to Gamesmaster magazine, Omega was supposed to be playable in Mario & Sonic at the Olympic Games, along with Silver the Hedgehog, Rouge the Bat, Jet The Hawk, Cream the Rabbit (who was later changed to a referee) and Donkey Kong. All of these characters, except Rouge and Omega, can become playable through hacking, along with Jet the Hawk, Big the Cat, a Kiki, Birdo, a Goomba, an Egg Pawn, an Flapper, a Bullet Bill, a Boo, Espio the Chameleon, Charmy Bee, Lakitu, Toad and a Bandit.

Mario & Sonic at the Olympic Winter Games
Omega appeared in Mario & Sonic at the Olympic Winter Games as a boss or rival character on both the Nintendo Wii and DS versions. His stripe returned to silver for this game and all following titles. He was voiced by the late Maddie Blaustein in English and Taiten Kusunoki returned to the role for Omega in Japanese.

In the Wii version in Festival, Omega suddenly comes out of nowhere to challenge the character(s) to Speed Skating 500m on Day 5 in Singles and Short Track Relay on Day 9 for Team, saying his defeat was impossible. After the player has beaten Omega, they can buy a suit of him for their Miis for a price of three hundred Star Tokens and the music that plays in the background while challenging him for seventy. The Miis can wear the Omega Suit in the game and it gives them stats that, presumably, would be identical to Omega's own if he were playable. Coincidentally, Omega's statistics are exactly the same as Dr. Eggman's.

In the Nintendo DS version, Omega plays a small role in the Adventure Tours mode as the first enemy boss of Blitzland and the final member of Team Dark to be fought against. In the story, Omega went on his old mission of defeating Eggman and confronted him in Blitzland, but Eggman said he would only fight Omega if he proved himself worthy by defeating Sonic and Mario, so Omega stationed himself in Blitzland near some storage tanks and waited. Eventually, Sonic and Mario appeared and Omega challenged them to Intense Short Track, but inevitably lost. He then confessed why he fought them and teleported back to the skating course in a black vortex to practice before Sonic, Mario or Toad could get a chance to make Omega their ally. The player can go against Omega again by either selecting to fight against him on the Mission List or by visiting his post by interacting with the board there, even though he's no longer visible. Despite gaining new artwork for Mario & Sonic on the Wii version, the artwork used for Omega on the Nintendo DS comes from Sonic Heroes.

Mario & Sonic at the London 2012 Olympic Games
Omega appears again as a rival in Mario & Sonic at the London 2012 Olympic Games in the London Party Mode, again voiced by Vic Mignogna and Taiten Kusunoki. His event this time is the 100m Sprint and you get the chance to meet Omega as one of three bonus events while exploring London in Free Time. He has received no new artwork or design changes this game and defeating him awards you a Big Sticker of Omega with his Sonic Heroes artwork on it. A Mii costume of Omega is also available and gives you his would-be stats when worn. With Omega's top areas being Acceleration and Max Speed, it seems he would have been a Speed type character, changing from Skill last game. Although no playable characters have these stats, they are shared with the Mii costumes of Marine the Raccoon and Wendy O. Koopa. Omega races by first gathering speed on foot, then uses his jets before charging for a final boost near the finish line as a last minute trick to win. When you speak to him, Omega will use more normal words like "hey" instead of his typical robotic phrases. This is only for when he's talking with word balloons, however, as you hear him talking vocally he sounds like his typical self.

In the Nintendo 3DS version of the game, Omega appears in a room with various equipment where Donkey Kong is training. Tails and Espio then shows up saying Omega is wrecking the place. When Omega shows up, he challenges Donkey Kong to an Olympic event, but DK declines. Tails and Espio agree to take them on, but Donkey Kong discovers Omega ruined his banana, making him furious. The event is Wrestling (Free Style) Match. After the player wins, a piece falls out of Omega and he says that someone was using this piece to control him and that his memory banks were blank. Omega then starts helping the players save the Olympic games. Along the way some memory banks are restored by random acts, such as when Eggman was mentioned, and when he bumped into Big).

Mario & Sonic at the Sochi 2014 Olympic Winter Games
Omega also appears in Mario & Sonic at the Sochi 2014 Olympic Winter Games, as a rival boss in the Roller Coaster Bobsleigh event.

Mario & Sonic at the Rio 2016 Olympic Games
Omega appears in Mario & Sonic at the Rio 2016 Olympic Games as one of the new playable characters. He is only playable in the Nintendo 3DS version of the game, and is exclusive to the Javelin Throw event. Omega's voice clips were taken from Sonic Heroes. A costume of Omega can be obtained in the game.

Omega does not appear in the Wii U version of the game, but the Omega costume from previous installments appears to be in the game.

Omega appears in the Arcade version of the game, but is a Rival character instead of playable.

Sonic Generations
Omega appears in the Sonic Generations manga at Sonic's birthday party helping with the food, but is absent from the party in the game and the entire storyline. However, he makes several cameo appearances; one on various signs saying E-123 Omega RD in the level Speed Highway as a reference to  Sonic Unleashed' s Empire City level, another in two screenshots shown during the end credits showing him in Sonic Heroes and Sonic the Hedgehog, miscredited as "OMGA" on a poster for the latest Chao in Space movie, Chao in Space: The Search for Tikal and finally as a statue in the hidden statue room.

Sonic Runners
In Sonic Runners, Omega is a playable Power Type character. In gameplay, he can perform a midair dash attack and boost the Enemy Bonus score by 100%. During the "Halloween" event, Omega was re-released as a variant with an Halloween-themed costume and coloration.

During the "Halloween" event, Omega and Rouge, alongside a Boo, investigated some Animals which had been turned into slaves by Dr. Eggman with odd candy. Discovering the candy wore off in strong light after investigating Eggman's factor, Omega and Rouge joined Team Sonic to stop Eggman. Using his built-in searchlight, Omega freed the Animals, except from the brainwashed King Boom Boo, who smashed Omega's searchlight. Fortunately, their Boo appeared with a replacement light and Omega freed King Boom Boo as well, thus ruining Eggman's operations.

Sonic Runners Adventure
In Sonic Runners Adventure, Omega is a playable character that can be unlocked by spending 2000 Rings upon reaching Chapter 3 (Lava Mountain). He retains his dash attack and the Power/Dark-type from the predecessor, with the "Dark" bonus here changing enemies into Golden enemies (which count as two normal enemies point-wise) for a limited time.

Sonic Forces: Speed Battle
In Sonic Forces: Speed Battle, Omega is a playable character with the following stats that are applied in gameplay:

Team Sonic Racing
In Team Sonic Racing, Omega appears as a playable character with his own race kart.