Sonic Adventure DS

Pikuniku is a puzzle and adventure game set in a colorful world. The player controls Piku, a small red creature, guiding him through levels and solving puzzles that mostly involve kicking and pushing objects onto switches to open the way forward. Piku can lasso his legs to swing from hooks and zip lines, curl into a ball to roll, ride minecarts, and travel through pipes to reach new areas. Along the way the player meets villagers to talk with and can spend coins earned in levels on items such as hats. A local co-op mode lets a second player control a similar orange creature named Niku across a set of cooperative levels.

A port of Sonic the Hedgehog for the Master System to the Commodore 64

Crackle Cradle is a 2D sidescrolling platformer/shooter developed by FoxTail. This game entails guiding the selected heroine through various areas, traps, and monsters, relying on a mixture of evasive skills and accuracy with their weapons.

A fangame based around the scrapped concepts of Sonic 1, combining some elements from the early prototypes.

Sonic Color Cursed is a 2D speed based platformer, inspired by the Genesis classics with a 1-bit artstyle! Dr. Eggman is up to his antics again and this time he’s stolen all the color from the planet! Sonic and friends will have to put an end to Eggman’s plans with flying colors! Or else the world will forever cease to have color! There are RGB scales for you to adjust to have your own shade of the game. You can also enable colored outlines for important objects!

Sonic Origins in Neo Geo Pocket Color style!