Surprisingly fun single-player missions. Part of the fun in this game is just dealing with your incompetent bot teammates who don't always behave... properly. Aside from the main campaign provided with the game, there are plenty of third-party mission packs out there that you can install, and many of those are fantastic as well. I got a remarkable amount of enjoyment out of this game, despite its age.

Also, Turtle Rock rules! (Particularly Mike Booth. He's the guy responsible for most of the programming behind Valve's bot systems used in CS:CZ/CS:S/CS:GO as well as L4D/L4D2/TF2. That guy is awesome.)

Surprisingly fun single-player missions. Part of the fun in this game is just dealing with your incompetent bot teammates who don't always behave... properly. Aside from the main campaign provided with the game, there are plenty of third-party mission packs out there that you can install, and many of those are fantastic as well. I got a remarkable amount of enjoyment out of this game, despite its age. Also, Turtle Rock rules! (Particularly Mike Booth. He's the guy responsible for most of the programming behind Valve's bot systems used in CS:CZ/CS:S/CS:GO as well as L4D/L4D2/TF2. That guy is awesome.)