I was making a list of programming languages games use. Without opening any of the .lmp files and finding out which software opens that kind of files, according to GitHub, Freedoom is made with Python according to the automatic language categorization, but on the other hand, Doom from 1993 is made with C, so maybe Freedoom is also made with C? On the other hand, you need a game engine, so it depends on the game engine, which programming language Freedoom uses?