I just finished MP, and it only took me a day and a half. Judging from other comments on Amazon I'm not the only person to have finished the game in such a short time. The graphics are a real mix. The cool particle engine shines as a stunning example of what we can look forward to in the next generation of game engines, but the scenery and background art looks brown and dull throughout the entire game - think Quake2 without the aliens and you're not far off.