My list of unofficial Celeste Classic ports. Not all of them have categories yet since I haven't tested all of them, I just tried listing the main ones.

• C++ (Web) https://bispoo.itch.io/celeste-classic-c-port
• GBA https://github.com/JeffRuLz/Celeste-Classic-GBA
• PicoSystem https://pixelpunker.itch.io/celeste-picosystem
• Playdate https://hteumeuleu.itch.io/celeste
• PSP https://archive.org/details/celeste.-7z
• PSX https://midnight-mirage.itch.io/celeste-classic-psx
• Retro Gadgets (PC) https://www.lexaloffle.com/bbs/?tid=50657
• TI-84 Plus CE https://www.cemetech.net/downloads/files/2198/x2724
• Xbox https://github.com/danielgpinheiro/ccleste-xbox
• ZX Spectrum Next https://davidprograma.itch.io/celeste

While ports try to take the original game from one platform to another, remakes try to rebuild the game from the ground up. I might include them here to avoid creating too many pages. So far we already have a page for the Scratch remake.

Let me know if you've found unofficial ports not listed here, or if you're interested in running any of them.