World Of Tanks
If you're looking for a quick diversion, this game can be entertaining. You can get free keys from MMORPG for the closed beta. Basically, it's a FPS-like tank game with RPG elements. You have light/medium/heavy tanks, really fast scout tanks, howitzers and tank destroyers. You get xp to research more advanced guns, suspension, radio (range of detection as you can't see them unless they're detected), and more advanced tanks, then you have to earn money to actually buy the items. Can get grindy as the jump from the second tank tier to the third is over 100k credits and you earn around 3-4k per battle. But it's well animated and entertaining in short bursts.
Re: World Of Tanks
I shall have to try this out.
Re: World Of Tanks
Some gameplay footage: http://www.youtube.com/watch?v=xpDrzmzIUaE