IGN結語
http://pc.ign.com/articles/104/1043744p3.html
Closing Comments
When you look at the total package, Call of Duty: Modern Warfare 2 is hands-down one of the best first-person shooters out there, and a truly amazing offering across any system. With that being said, our score comes with a disclaimer. For those planning to check out everything Modern Warefare 2 has to offer – online competition, full co-op Spec Ops mode, as well as the campaign – you’re looking at a no-brainer purchase. For the strictly single player crowd, however, Modern Warfare 2 is surprisingly short, and doesn’t live up to the standard set by previous Call of Duty games. The campaign can be completed in as little as four and a half hours, and the missions make better scenarios and moment-to-moment adrenaline rushes than they do a cohesive, well-told story. If you’re going solo, you’ve officially been warned. Look at the complete Modern Warfare 2 experience though, and there’s no denying its rightful place at the top.

如果單機模式只有約4.5小時,那真的太短了,
我也考慮不買此遊戲,
其一單機模式過短,
其二售價不符民情,
其三steam之安裝(如果單機模式需要)~~