ModdingWiki:Community portal

Discussion

• RGB Classic Games modding forum (any/all DOS games)
• Keen:Modding (Commander Keen and others sharing the same engine)
• Xentax forum Reverse engineering discussion, with a focus on archive file formats and more modern games

Other resources

• REWiki - reverse engineering wiki (similar to this wiki but not restricted to DOS games)
• Xentax game wiki - game archive format documentation, with more of a focus on modern games and also game consoles
• Deniz Özmen's game resources - quite a few unpackers for various games