DOOM: BFA (Big Freaking Anniversary) Edition (former Classic RBDoom 3 BFG)
is a source port based on RBDOOM-3-BFG and enchance the experience of
Ultimate DOOM, DOOM 2 and DOOM 3.

Note, to play the original game, you'll need a copy of the game data.
The package can also be used with free map data, like the demomap from
OpenTechBFG.