This forum is for discussion of fan created game remakes, patches, modifications, and original games based on the PS games, both classic and modern.
You can find some fan games in the Downloads area. Aside from the Fan Games category there, be sure to check the Emulation Patches category for modifications of existing games.
If you need resources for creating a fan game, the Downloads area is also home to Sprite Sheet Packs and Tile Packs that may be useful to you.