Another TR implementation, cool. Hope it runs with OpenGL 2.1, as I didn't have lots of luck under OpenTomb, and compiling OpenLara it's very sketchy.

For more libre game engine reimplementations: https://osgameclones.com

For a lot of cases, the libre engine it's far better than the original one. For instance, Exult for Ultima VII or ScummVM, which today runs far more stuff than Lucas Arts and Sierra games.