You'll also have no trouble finding a server to play on, Quake II has spawned hundreds of dedicated servers to host your frag fest across the Internet. This also allows more players to participate at a time. In any case it can be quite addicting to stalk the most elusive of prey and rack up a few frags. I have visions of seven figure contracts to play with the San Mateo Mutants. One disappointment of Quake II is the lack of any cooperative play.
Death matches are the only option.
If you're willing to download some large files, id recently released a point upgrade, version 3.14, which not only addresses a few bugs but also allows you to upgrade your game to include a Capture the Flag mode. The Levels Levels tend to be on the small side. Typical numbers of enemies in single player maps are in the region of 30-50. Design is sometimes interesting, with multiple levels and hard to reach places with hidden goodies. You'll often have need of some special equipment to get certain places, rebreathers and environment suits make an appearance.