To compile CDoom type Compile.bat, you need djgpp 2.02 runned under Dos, Win9x, or Dosbox under Win NT, XP You need the follow files in the djgpp directory: In Djgpp main dir: djgpp.env with this info DJDIR=%:DJGPP In Djgpp\lib need crt0.o , crtf.o , djgpp.djl , libc.a , libgcc.a In Djgpp\bin need as.exe , cc1.exe, cpp.exe , cwsdpmi.exe, gcc.exe , ld.exe In Djgpp\include need conio, ctype, dir, dirent, dos, dpmi, fcntl, go32, io, limits, malloc, math, pc, stdarg, stdio, stdlib, string, stubinfo, time, unistd, values headers In Djgpp\inlines _inline,ctype.ha, ctype.hd, pc.h In djgpp\libc asmdefs, atexit, dosio, file, unconst headers In Djgpp\netinet in.h In Djgpp\sys cdefs, djtypes, movedata, segments, stat, types, version headers You need run also set DJGPP=\djgpp\djgpp.env set PATH=\Djgpp\bin This is a french version of CDoom, same features except engine messages are written in french and fixed all bugs in sound cards support. The complete documentation of CDoom 2.06 is in file CDoomfra.txt