Remember that arcade-like game ‘Doom’, which was the ancestor of First Person Shooter? It exist in 1993. That was like 17 years ago and people still play it today. Although, the game engine is enhanced but it still has the classic feelings. The engine developer had come up with many advance feature which was unavailable in the original game engine such as mouse look, external wad, key binding, and so on. One of my favorite doom engine, a.k.a. Source port, is GZDoom. It uses OpenGL as the default rendering.
The original Doom
Enhanced gameplay with GZDoom
Total annihilation is also a classic game. Released in 1997, this Real Time Strategy (RTS) is 13 years old and people still play it today. Like Doom, developers enhanced the game to make it even better. One community has develop a new engine to play the game in 3D. It’s called TA3D
The original Total Annihilation
TA : Escalation mod
TAUniverse, a place you can modify your Total Annihilation. It provides resource for units, maps, and mods