Reverse engineering The Legend of Zelda: Breath of the Wild. Documenting various file formats and implementing viewers/editors.
Contributed here: https://github.com/HandsomeMatt/botw-modding
Used to extract heightmaps using a TSCB terrain descriptor file
Used for viewing TSCB files and extracting information out of them visually (useful for figuring out unknown fields in TSCB/purpose of heightmaps)
Actually load and view TSCB heightmaps in 3D directly from a rip of the game.