Free & Open Source Platformer Games
418 free, open-source platformer games — real clones and remakes you can download, inspect the source of, and modify. Not just free to play: the code itself is open.
Clone of Jetpack
A browser-based remake of Jetpack, currently semi-complete, with a built-in level editor for placing tiles and playtesting instantly.
Clone of Celeste Classic
The itch.io listing for Celeste Classic, the PICO-8 game, tagged 2D, PICO-8, hardcore, and Speedrun, reflecting its speedrunning use.
