Iron Warriors: T-72 Tank Commander

The game is set during the Yugoslav wars of 1991-1995. The player is a Russian volunteer tank commander who is there to aid the Serbs. The player can use the T-72B, the T-55A and the T-34-85. The game has realistic physics, including the tank engine's complexity being simulated as well. The player can switch between the different tank positions, such as the driver, the gunner, the machine-gunner, and the commander.

Several players can play in multiplayer mode and occupy different stations in the same tank.

Source: Wikipedia, "Iron Warriors: T-72 Tank Commander", available under the CC-BY-SA License.