Freedoom: Phase 1

Freedoom: Phase 1 is a Doom styled first person shooter game using the

Doom engine, featuring Four chapters, nine levels each, totalling 36

levels.

There is a massive back catalog, spanning over two decades, containing

thousands of Doom levels and other modifications (“mods”) made by fans

of the original Doom game. Freedoom aims to be compatible with these and

allows most to be played without the original Doom datafiles.

Freedoom: Phase 1 aims for compatibility with The Ultimate Doom,

also known as plain Doom or Doom 1.