Crysis 2, i wasn't really expecting much but hey the campaign was probably the best one i've seen in an FPS since back when CoD was primarily singleplayer focused (CoD 2 ftw)
Also the multiplayer is fucking awesome, kudos to the devs for making the killstreak system so awesome, i just find it funny whenever the resident team sniper makes an awesome across the map shot and then has to trudge across the map to pick up the dogtag. It's a nice risk/reward system.
Although finishing the campaign in (almost) one sitting then trying out the multiplayer for the first time is practically suicide
Single Player Armour: Badass guy shugging off tank shells, bullets, alien bullets etc (maniacal laughter optional)
Multiplayer Armour: Lets you take about 5 extra shots before becoming worthless
It was a bit jarring to say the least XD