I recommend this if you have friends to play with. 4v4s with friends are incredible.

Intruder has some of the most intense and funniest matches of any game I have ever played. The thrill of sneaking into the briefcase room and trying to exit out of a vent only for a dead body to block your exit. Watching a 1v1 and not being able to tell your teammate what is going on is so exciting.