The plot is your standard "Sonic and friends fight Dr. Eggman" deal. The game features a set of 7 original zones, Time Attack and Mission modes, plus some extras. Get it on Sonic Retro.
A sequel is in the works and as of May 2018 has been reported to be in a near final state of production.
Tropes featured include:
- Alliterative Name: The zones' names, with the exception of Death Egg.
- Author Avatar: An orange hedgehog represents Hez.
- Bait-and-Switch Boss: Eggman's Giant Mech has a cameo on Death Egg Zone, in which it explodes, sending Sonic to fight against Giant Silver Sonic.
- Bonus Level: Features special stages for Emerald collecting and bonus levels for extra lives.
- Boss Rush: An unlockable.
- Crosshair Aware: The final boss uses this in one of its attacks.
- Debug Mode: One that works just like the ones from the Genesis Sonic games.
- Embedded Precursor: Classic 2 will include modified versions of all levels from Classic 1. It will also include levels from Sonic 1 and eventually those from Sonic 2.
- Eternal Engine: Robot Rave.
- Flipping the Bird: Hez's Victory Pose. If fits nicely because he's the Author Avatar and normally appears as a rival in Time Attack mode.
- Giant Mook: The "Giant Badnik Hunt" challenges, where you have to find and defeat a giant version of a regular enemy in a level.
- Green Hill Zone: Hazel Hills.
- Hailfire Peaks: Crystal Caverns is a combination of Lethal Lava Land and Slippy-Slidey Ice World.
- Humongous Mecha: Giant Silver Sonic, the Final Boss.
- Meaningful Background Event: An endless line of Giant Silver Sonics is seen on the background for Robot Rave. For better or for worse you only fight one at the adventure's end.
- Not the Fall That Kills You…: The ending is exactly like the one from Sonic Advance 2.
- Nostalgia Level: Death Egg is the final level, based on the one from Sonic 2. Gigalopolis, Aqua Arena and the Special Stages are based on levels from Sonic Chaos. Bridge Zone from the 8-bit version of Sonic the Hedgehog is unlockable.
- Puzzle Boss: Dr. Eggman's machine in Desert Dunes is immune to rolling attacks, so you make it suck its own spiked bombs instead.
- Rise to the Challenge: Robot Rave Act 3, accompanied by a remix of Sunset Park Act 3.
- Secret Character: Ashura and Blue Knuckles. By editing the save file you can also play as Fang, Shadow and Hez.
- Secret Level: Bridge Zone from the 8-bit version of Sonic the Hedgehog.
- Sequel Escalation: The second game is planned to have a much larger scope, as it contains on top of its own level set a remake of the first game and the first two Sega Genesis Sonic games. Development videos also show some complex mechanics such as Sonic being able to equip two shields at once to combine their traits and special moves.
- Shifting Sand Land: Desert Dunes.
- Space Zone: Death Egg.
- Super Mode: After collecting all Chaos Emeralds. Hyper mode is also available as an extra.
- Under the Sea: Aqua Arena and Luster Lake.
- Underwater Boss Battle: At Luster Lake, essentially an underwater version of the Green Hill Zone boss.
- The Unfought: Fang The Sniper appears three times during the game to set traps on Sonic, but never fights him.
