Sonic 2: Community's Cut

Parent game

Dr. Eggman (aka Dr. Robotnik) has returned, turning helpless animals into robots and forcing them to build his ultimate weapon, the Death Egg! But this time, Sonic has a friend that can help him: Tails! Find the 7 Chaos Emeralds and stop Dr. Robotnik’s evil scheme!
Could be interesting

Pepper Grinder is an action-packed pirate adventure starring the titular Pepper, a seafaring soul with a passion for prospecting, and Grinder, her super-powered drilling device.

A challenging puzzle platformer inspired by games like Limbo and Badland.

Forgotton Anne is a 2d cinematic adventure game combining puzzle platforming with adventure game elements. You play as Anne, the enforcer keeping order in the Forgotton Realm, as she sets out to squash a rebellion that might prevent her master, Bonku, and herself from returning to the human world. The World of Forgotton Anne: Imagine a place where everything that is lost and forgotten goes; old toys, letters, single socks. The Forgotten Realm is a magical world inhabited by Forgotlings, creatures composed of mislaid objects longing to be remembered again.

Semblance is an innovative platformer with deformable terrain, set in a beautiful minimalist world. It’s a game that asks, what if you could deform and reshape the world itself? Semblance takes the idea of a ‘platform’ in a platformer and turns it on its head.

Sonic Requeset is just your generic Sonic fan game.

A Sonic fan game set in the SatAM universe.

A fanmade remake of both Sonic the Hedgehog Chaos and Sonic the Hedgehog Triple Trouble for Sega Game Gear, featuring new characters and habilities, new zones and levels, red star rings to unlock new stages, blue spheres special stages, Time Stones, a 16 bit music mode, a hub world, Ultra transformations, a pause menu, a debug mode and cheats, new color palettes and new player camera, gamepad support, 30 and 60 fps support, 4:3, widescreen and ultrawide.

Sonic Advance Revamped is a remake and reimagining of the original Sonic Advance on the GBA using the Sonic Worlds Delta engine; it's a passion project designed to be the definitive way to play Sonic Advance, with better hazard placement, a 16:9 aspect ratio, patched-up levels and bosses, completely redesigned Special Stages, the smoothest sprites from each GBA Sonic title (with some special cases and custom sprites here and there), re-implemented unused/beta elements, and true classic Sonic controls to make the game feel even better. Features set for the future include an exclusive Team Chaotix Mission Mode, 8 Unique Playable Main Characters (7 of which are playable in this Demo), a fleshed-out Tiny Chao Garden, New Levels and Music Tracks, and more! For this particular Demo, Sonic's Insta-Shield is swapped-out for his Drop Dash! This move will be an early unlockable in the final version.

Sonic the Hedgehog 3D is a free fan game about a famous SEGA mascot, Sonic, and it is made on Build Engine with additional EDuke 32 port. The game was inspired by two classic Sonic series: Mega Drive/Genesis and Sonic Adventure series.

Pikuniku is an absurdly wonderful puzzle-exploration game that takes place in a strange but playful world where not everything is as happy as it seems. Help peculiar characters overcome struggles, uncover a deep state conspiracy, and start a fun little revolution in this delightful dystopian adventure!