CDoom is a set of four Doom source ports for DOS by Carlos. Version 1.9 is a clone of doom2.exe, while version 2.05 is based upon MBF and version 2.06 messages are written in french, version 2.07 support slopes, breakable floors walls ceilings, chasecam, look up down, crouch, shootable corpses, spawn things above 3dfloors. The four versions are compiled with DJGPP and played under DOS, and may have sound problems running under recent versions of Microsoft Windows, to solve this problems use vdmsound library.