Doom II full play through with the FreeDOOM mod

This playthrough is Freedoom - Phase 1 (v0.12.1).

FreeDOOM is the 1-player version. There are two phases, including this one, which is regular Doom II but with the mod and there is the second phase, which is their own maps. There is also FreeDM, which is without NPC's and meant for 1v1 combat with other player.

From the wiki:

"The project was started and originally maintained by Simon Howard and Jon Dowland in 2001."

https://doom.fandom.com/wiki/Freedoom#:~:text=One%20is%20to%20create%20a,and%20Jon%20Dowland%20in%202001.