This game has been under developement for some time now, and was scheduled for spring this year. I hope it's not vapourware, coz the demo looks promising indeed!
It's a Russian made tank sim taking place during WW2, and the demo can be found here:
http://steelfury.info/index2.html
For the trailer:
http://www.youtube.com/watch?v=xrE4ZwK31U4
Somewhat hefty system requirements though:
Recommended is a 3 Ghz super-duper-ultra processor and 1.5 GB Ram along with not-a-crappy-video card.