One of the funnest, most addictive games I've played, and it's free! worldoftanks.com You can buy gold to upgrade tanks, etc, but you can do just fine with the free stuff. I've been playing for a week or so now and can't get enough. Anybody else playing?
I downloaded it but have not played it. I spent about a week seriously addiction to the great granddaddy of this genre http://tanksgame.org/battle-tanks
Minimum system requirements for the game client: Operating system: Windows XP/Vista/7 Processor (CPU): Intel from 2.2 GHz or equivalent AMD Family (RAM): minimum of 1.5 GB for Windows XP, 2 GB for Windows Vista / 7 Free hard disk space: At least 3.5 GB Video Card: Shader Model 3.0 GeForce 6800GT with 256 MB of RAM / ATI X800 with 256 MB RAM, DirectX 9.0c Sound Card: DirectX 9.0c compatible Internet connection speed: at least 128 Kbps.