If you are looking for a good tank game/sim at a reasonalbe price, try Steel Beasts 1
Free Demo can be downloaded here:
http://www.gamershell.com/download_4211.shtml
Full Boxed version with the printed manual can be purchased ($16 US) here:
http://bigdaddysoftware.com/steelbeasts.html
And tons of scenarios, mods, training utilities, maps and the like can be downloaded for free here:
http://www.steelbeasts.com/modules.p...ads&file=index