Rooftop Run (Sonic Generations)

Rooftop Run, also known as Spagonia, is one of the stages of the game Sonic Generations. This level is part of the original Spagonia from Sonic Unleashed. The stage was revealed at the end of the City Escape gameplay trailer with Modern Sonic flying through it. It was revealed once again in the Two Sonics Trailer with both classic and modern Sonic. It is one of the stages featured in the Modern era of the game.

The visual aspects of the stage are very similar to its counterpart in the PS3/360 versions of Sonic Unleashed. A celebration of some kind seems to be partaking whilst the two Sonics progress through the stage, with confetti and balloons decorating the sky, similar to Tropical Resort from Sonic Colors. The balloons can be used to bounce to a higher area. A lot of the gimmicks from the night stages of the original Spagonia are in the classic version although many of them act differently. The rolling barrels previously used to break open gates will instead chase Classic Sonic. An airship with an Eggman symbol has been shown, where Classic Sonic will jump into the airship, while Modern will chase the Flying Battery with three Aero Chasers. Like Seaside Hill, this stage has a reference to Sonic 3, in the form of the Flying Battery Zone.

Concept art of the Aero Chaser robot was found in the Sonic Generations demo, and was later officially revealed in a set of screenshots along with the Egg Fighter and Egg Launcher. The Aero Chasers will act differently in classic stages, chasing him on a 2-D plane.

Characters

 * Sonic the Hedgehog
 * Vector the Crocodile (rescued character)
 * Charmy Bee (Mission for Classic Sonic)

Enemies

 * Aero Chaser
 * Aero-Cannon
 * Egg Fighter
 * Egg Launcher

Act 1

 * Doppelganger Race!: Face off against Sonic's double and beat him in a race to the Goal.
 * High-Rise Balloon Climb: Use the Big Balloons to climb higher and higher and reach the Goal in time.
 * Dash Ring 1-2-3: Pass through all Dash Rings in order and reach the Goal before time runs out.
 * Charmy: Don't Bug Me!: Watch out for Charmy! Reach the Goal in time while avoiding Charmy.
 * One Ring Challenge 2: reach the Goal in time with only one Ring.

Act 2

 * Barrel Ring Bonus: Smash open barrels to get the Rings inside and grab a set number before time runs out.
 * Doppelganger Race!: Face off against Sonic's double and beat him in a race to the Goal.
 * Rooftop Rail Grind: Go boarding across the rooftops and clear the stage in time.
 * Endless Boost: Boost to the Goal before time runs out to earn the Endless Boost Skill.
 * Vector: Pick Up the Beat: Pass notes back and forth with Vector until the croc misses the beat.

Trivia

 * Spagonia appears to be in a middle of a celebration that wasn't present in the original version of the level. It seems this celebration is international as every Country's flag of Sonic Unleashed is present in the background of the classic gameplay.
 * The cameo appearance of Flying Battery Zone makes a reference to when it had a seemingly random appearance in the first level of Sonic 3.
 * In a video showcasing the modern version of Rooftop Run, the Flying Battery Zone flies around the city following Sonic, it drops the barrels that roll down the hills and it lets out the Aero Chasers towards the end of the level, releasing more when then the others are destroyed.
 * This time around the Flying Battery Zone's appearance makes some of the oddities in Sonic Unleashed make more sense compared to its originally random appearance it had in Sonic 3. The Flying Battery Zone releasing the barrels and Aero Chasers explains why they are there, in Sonic Unleashed the barrels would appear out of nowhere when Sonic got to the top of the hill, and the Aero Chasers would also randomly fly onto the stage when the others were destroyed.
 * This is the only stage in Sonic Generations to have been previously created with the Hedgehog Engine. Therefore it is the level with the least amount of graphical enhancements. Although the Generations version differs in many ways compared to the original Sonic Unleashed portrayal.
 * The Modern theme for the level is similar to the original with several enhancements to the violin, melody and bass modifications, and an alternate intro.
 * In the original, Sonic went to the Big Tower using springs, while in this version, he uses a Rainbow Ring and Combo Tricks to get over top of it to ride a rail on the other side.
 * Classic Sonic's remix for this stage seems to be completely different from the original, unlike most of his remixes.
 * This is the only positive stage in the Modern era, since this stage throws a celebration while Crisis City is a burning apocalypse and Planet Wisp is a forest destroyed by Eggman's technology.
 * Some parts in the level are also from the main hub-world from Sonic Unleashed, such as Sonic boosting through Professor Pickle's house.
 * In Act 1, it has parts where you can use huge barrels to destroy enemies, much similar to some parts of the night stage of Rooftop Run in Sonic Unleashed.
 * In Act 1, Classic Sonic can be controlled in 3D via a glitch using the thunder shield double jump ability while being catapulted through a set of springs directly after leaving the front of the university.

Videos
thumb|left|300px|Modern and Classic Gameplay