Easily the most essential of any of the Quake expansions. Huge strides have been made visually, and the designs of the maps are pretty uniformly excellent (bar a couple of exceptions, but they're forgivable). It's also nice to see a developer trying to switch up the Quake format a bit, giving the player a level select hub like the original game with some extra freedom. The final boss sucks about as much as the main game's, so that's an unfortunate bruise on things. All in all, though, I'd happily jump back into this over any of the other expansions if I wanted to do a playthrough of Quake again.