List of file formats from ReWiki
ReWiki website is no longer available on the internet.
Here is the link to the backup version on the web archive https://web.archive.org/web/20180114112340/http://rewiki.regengedanken.de/wiki/List_of_file_formats
And here is the list of formats covered on the REWiki in the last web archive snapshot:
.ADT (Resident Evil 2)
.ALF (Realms of Arkania: Shadows over Riva)
.AMP (Dark Legions)
.APT (Dungeon Keeper)
.ARD (Resident Evil 3)
.BLV (Might and Magic 6)
.BSP (Quake)
.BSS (Resident Evil)
.CC (Might and Magic 3-5)
.CLM (Dungeon Keeper)
.CMP (Wipeout)
.COL (Dark Legions)
.DAT (Dark Legions)
.DAT (Desert Strike, Jungle Strike)
.DAT (Dungeon Keeper)
.DAT (Resident Evil 3)
.DAT (System Shock)
.DAT (Telekommando2)
.DAT (Marble Drop, 3D Pinball)
.DAX (Curse of the Azure Bonds)
.DIR (Commandos)
.DLT (Stargunner)
.DOC (Dungeon Keeper)
.EFF (Dungeon Keeper)
.EMD (Resident Evil 2)
.FLG (Dungeon Keeper)
.GLB (DemonStar, Raptor)
.HMP (Various DOS games)
.IDX (Discworld 1, Discworld 2, Discworld Noir)
.INF (Dungeon Keeper)
.LBX (Master of Orion, Master of Magic, Master of Orion 2)
.LGT (Dungeon Keeper)
.LOD (Might and Magic 6)
.MAP (Dark Legions)
.MD2 (Quake II)
.MD3 (Quake III Arena)
.MDL (Half-Life)
.MDL (Quake)
.MUS (Discworld 2)
.MUS (Discworld Noir)
.MUS (The Dark Eye)
OBJPROP.DAT (System Shock master object properties)
.ORI (Dungeon Keeper)
.OWN (Dungeon Keeper)
.PAK (Resident Evil)
.PLD (Resident Evil 2)
.PLW (Resident Evil 2)
.PRG (The Adventures of Robin Hood)
.PRM (Wipeout)
.RBH (Discworld Noir)
.RDT (Resident Evil)
.RDT (Resident Evil 2)
.RES (Eye of the Beholder 3)
.RES (System Shock, Ultima Underworld, Strike Force Centauri)
.SCN (Discworld 1, Discworld 2, Discworld Noir)
.SLB (Dungeon Keeper)
.SMP (Discworld 1, Discworld 2, Discworld Noir)
.SPR (Curse of Enchantia)
TEXTPROP.DAT (System Shock master texture properties)
.TGA (Might and Magic 6)
.TIM (Various PC and Playstation games)
.TMD (Various PC and Playstation games)
.TMN (Dungeon Keeper)
.TNG (Dungeon Keeper)
.TRF (Wipeout)
.TRS (Wipeout)
.TRV (Wipeout)
.TXT (Discworld 1, Discworld 2, Discworld Noir)
.TXT (Dungeon Keeper)
.VSN (Dungeon Keeper)
.WAD (Commandos)
.WIB (Dungeon Keeper)