Judging from my experience with Quake 4. Just came back to life after a 4 hour session; Quake 4 is just uninspired garbage. I have been a quake fan for years since quake 1 and the multiplayer is horrible in Q4. The physics are complete crap with nerfed rocket jumping, the maps are small in scale compared to quake 3 and only 16 ppl per map max!
The graphics are very nice but after the singleplayer gets done which is very linear!! I mean they might as well put traffic signs to tell you where to go. This title will sit in your games rack. The outdoor portions of the game,in hover tanks and other machines are also very boring. My advice is to without a doubt...not pick up this game.