And according to Steam I have played for 4 hours. And that includes 20-30 minutes messing around in the practice map... Must be the shortest singleplayer campaign I have ever played. I thought COD4 was short, but damn... Anyway the time you spend will depend on your difficulty setting. I played on the easier settings.

I enjoyed it though. Liked it better than the campaigns for Bad Company 2, Modern Warfare 2, Black Ops and the latest Medal of Honor. Story and characters are nothing special. Didn't get attached to anyone. Actually I got rather annoyed with everyone because they LOVE to get in your way.

I haven't tried multiplayer yet.

It's a good game, but be aware that if you don't play these games online, you're not going to get your money's worth with just the singleplayer.

Just my 2 cents on the game for what it is worth.