Even though the game is set in Paradise, AZ, it truly captures spirit of living in Omsk.

One of the best first-person shooters. I think that every enjoyer of the genre should play this game, no matter what. Peak level design, amazing graphics for the time, big, but not always open areas, powerful, but balanced weapons, and smart, but not unfair enemies. Digital Extremes did really good job to make the impressive tech demo for Unreal Engine a really fun and challenging game.

This game is definitely a big improvement from Portal. More game mechanics, more characters, more tests, more story, more lore, more humor, more personality, and most definitely more fun. And the execution is on top. The co-op mode is a really good addition to the main game. Replaying this sometime later.