The Doom engine is the game engine that powers the id Software games Doom and Doom II, as well as Raven Software's titles Heretic and Hexen, then finally wrapping its final commercial license with Rogue Entertainment's Strife. It is a sector-based engine, with 2D sprites representing objects, enemies and everything else that's not the map.
Many WAD files have the same name (e.g. DOOM.WAD). The versions can only be differentiated correctly using hash values. Here is my simplified solution...
idtech1: how to easily identify the many different wad files
Doombuilder or GZDoom Builder crashed? didn't save your work? damaged file or lost your map? restore it this way.
restore map after doom builder crash
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