I'm sorry - a little mistake: This is not really the cheat I'm missing (but just another one): In case of DOOM and DOOM2, instead of "IDDT" I would be searching for "IDBEHOLDA". The difference is: "IDDT" sets the whole map to "known and seen" (every line is red); "IDBEHOLDA" instead sets only all walls to "known", but some are unseen and therefore grey, not red.<br><br>In DOOM, I can use "GIMME ALLMAP" (at least, this cheat is defined in progs/doom/server/cheats.vc); unfortunately, a similar cheat is defined for DOOM and Strife, but not for Heretic or Hexen!<br><br>For all games, in progs/(game)/server/inter.vc is a function P_TouchSpecialThing defined, and the thing of interest (computer map, super map) gives the player an item called IT_ALL_MAP.