Military Life: Tank Simulator (Steam key/Region free).

http://store.steampowered.com/app/452000/
Have you ever dreamt of riding a tank? Now you have got the chance to do it. The times when this sort of simulation was highly complex and enormous complicated are over. This game differs completely from the others and captivates with its intuitive and easy to learn gameplay. Furthermore it gives you the opportunity to move virtually free in a vast 3D landscape.

Depending on the task your mission can be the most perfect and precise completion of a contract or a demonstration of the highest possible destructiveness. Two different kinds of tanks as well as the varied level design guarantee a long lasting fun factor for all fans of these big machines.
Features
Completely detailed scenery in 3D graphics
Intelligent enemies are awaiting you
Intriguing, ongoing story
Day / night shift
Amazing effects such as smoke, explosions, fire or mist
Long lasting fun factor
2 tank models: Sherman Firefly & Tiger I
Intuitive control via keyboard and mouse