Sonic Dash 2: Sonic Boom is an endless runner platform video game published by Sega, exclusively for mobile devices, and is the sequel to Sonic Dash. Unlike its predecessor, the cast and levels of Sonic Dash 2: Sonic Boom are derived from the Sonic Boom television series, though the gameplay elements remain. The game was given a soft launch on Google Play on 1 July 2015 for the Android, and is currently offered for free via the Google Play and iTunes stores.
Sonic Dash 2: Sonic Boom uses many of the same gameplay elements from Sonic Dash. The game is an endless runner, where the player directs the playable characters through never-ending 3D levels, collecting rings and avoiding obstacles and enemies. The playable character automatically moves forward at all times, so the player has to utilize the characters' skills and movements to avoid or overcome obstacles. The goal is simply to run as far as possible without hitting a wall, falling off the course, or taking a hit with no Rings in possession.
Like its predecessors, Rings can be collected throughout the levels or purchased via microtransactions. Accumulated Rings can be used to purchase further content in the game, such as items and upgrades. Throughout the levels Red Star Rings can be found (only five can be found on the course per day); however, players can purchase them as well, or obtain them from Prizes. They are used to buy new playable characters, every fifth upgrade for a character, and can also be used to prolong gameplay and to purchase other incidentals such as Event tickets and storage for upgrades.
Sonic Dash 2: Sonic Boom features both enemies and levels/environments taken directly from the Sonic Boom television series. As new features, the game introduces Team Play mode where the player gets to race with up to three characters and earn higher scores, the Enerbeam mechanic where tilting the device will swing the runner along Ener-Rails, and special unlockable powers for the characters such as Amy's Hammer, Knuckles' Jump Up & Slam attack, Sonic's enhanced Dash and more. The game also includes magical beings called "Sprites" which the player can collect and evolve to improve their run, similar to the Chao in Sonic Chronicles: The Dark Brotherhood.
There is a special type of gameplay boost called the "Boom Boost" which works as follows:
- Shortens the cooldown times between free sprite boxes.
- Gives the player a free revive every run.
When winning a Boom Boost from a Prize (mostly obtained via Missions or Events), the player gets an hour added its total duration time. The first Boom Boost win will last one hour; after the player uses it up and then collects another one, it will last two hours; the next will last three hours etc. If the player does not let the Boom Boost run out, the next one will only add an hour to the total time the current Boom Boost is supposed to last.
A duration of a week can be purchased for $1.99. Doing so also disables most in-game ads (other than those offered to gain an additional free revive during each run).
By spending Rings or Red Star Rings, characters can be levelled up. Doing so increases the characters' Character Score Multipliers, making it easier to gain more points whilst they are a member of the player's team during a run. Raising a character's level will furthermore sometimes add to the player's Global Score Multiplier level. Level 5 grants 100XP, level 10 grants 150XP, and level 15 grants 250XP.
These are the playable characters of Sonic Dash 2: Sonic Boom. Each character has a special ability that generally impacts the game as they are running, and boosts the score the player receives as long as they are part of the team:
|Icon||Character||Special Power||Score Bonus||Unlocking Requirement|
|Sonic the Hedgehog||Dash Ring Magnet: Ring Magnet while Dashing||Distance Score: Multiplies the points received per meter run.||Available from the beginning|
|Miles "Tails" Prower||Second Chance: Extra Free Revive once per run.||Distance Score: Multiplies the points received per meter run.||70 Red Star Rings|
|Knuckles the Echidna||Knuckle Slam: Jump up and slam down to unleash a powerful Badnik-busting blast.||Enemy Score: Multiplies the points received per enemy destroyed.||30 Red Star Rings|
|Amy Rose||Ring Hammer: When Dashing, your hammer turns enemies and obstacles into rings.||Enemy Score: Multiplies the points received per enemy destroyed.||30 Red Star Rings|
|Sticks the Badger||Protected Combo: Your combo does not reset when you run into enemies and hazards.||Combo Score: Multiplies the points received per combo.||50 Red Star Rings|
|Shadow the Hedgehog||Chaos Blast: Destroy mines and enemies with a powerful attack!||Combo Score: Multiplies the points received per combo.||
Sprites are magical beings and the companions for the characters. Equipping them will unlock special abilities that provide support during a run; up to three may be used at a time. Some can only be used once (One use), whereas others can be used repeatedly (Forever). Forever Sprites can be levelled up and evolved to improve their abilities.
During regular play (outside of event mode), two missions are assigned at a time - one from each of the lists below. Missions from the first must be completed within a single run, whereas missions from the second may be achieved over the course of multiple runs.
Completing a mission awards a prize at the end of play (either Paper, Bronze, or Silver. Prizes offer XP to the player's Global Score Multiplier in addition to Rings, Red Star Rings, Sprites, or Boom Boosts), and moves the player on to the next mission in the list. When completed, each list repeats from the top.
The player can participate in new Events and Daily SEGA Challenges to earn special Prizes. The player will need an internet connection for this; the rest of the game can be played offline. Upon finishing the event, the player will enter a leaderboard where the top fifty players get extra prizes when the event timer expires.
Event goals vary, as do the prizes. Short events, with a Sprite Bottle as an award, are offered regularly (multiple times per day) and have short durations. Events with more valuable prizes may last multiple days.
Players are awarded points during gameplay, and new high scores are recorded after a run. Furthermore, scoring high during the "Score Chaser" event can increase a player's rank and unlock greater prizes. One point is earned per meter travelled, and a hundred per enemy destroyed. The game also offers points for achieving combos - actions performed in quick succession, such as destroying enemies or narrowly dodging obstacles. Twenty points are awarded for each action, increased by ten after every fifth.
Points are multiplied according to a player's Global Score Multiplier (GSM), and points of a given type (distance, enemies, or combos) may be multiplied further by individual Character Score Multipliers (CSMs), each of which adds the base 100% value of the score. For example, a GSM of 200% becomes a 3x multiplier, whereas a total "distance" CSM of 300% becomes a 4x multiplier; together, they make a 12x multiplier for the points earned from the distance travelled. Players can increase their their GSM primarily by acquiring XP from opened prizes. Unlocking extra characters and levelling them leads to higher CSMs as all characters in a team contribute.
The highest GSM possible is 1000% at level 41 (25% gained per XP rank), although prizes are awarded for gaining further levels. Each character's CSM may reach a maximum of 700%.
Prizes are awarded for completing Missions or Events, as well as for daily logins and some other occasions. Each prize provides XP for increasing the player's Global Score Multiplier, and contains usually a random amount of Rings, or Red Star Rings. Others instead offer Sprites or Boom Boosts, sometimes even as additional gifts. Noticeably, Sprites Bottles do not award XP, Rings, nor Red Star Rings; they instead provide either any "One Use" Sprite or level 1 "Forever" Sprite.
The "Green Christmas Box" was offered during December 2015 as the 3rd Daily Login bonus (spanning an eight-day cycle). "Gold Christmas Boxes" were given for the next three, and then a "Red" for the seventh. These prizes presented either the Sparkle or Flurry Sprites in addition to their other rewards.
- This is the first sequel in the Sonic franchise that does not take place in the same continuity as the first game; whereas Sonic Dash took place in the continuity of the main Sonic game series, this game is set in the Sonic Boom continuity.