With the DarkPlaces quake engine you still can play Quake on a computer with a modern operating system! The DarkPlaces Quake engine is the best source port we've encountered so far.
But it was an instant classic FPS anyway, with true 3D level design and polygonal characters, as well as TCP/IP network support. Play Quake with the DarkPlaces engine Quake: another all time classic, although this DOS game looks like it was never really finished properly (which is true).
