Tank
With World War II the multi-turreted tanks proved impracticable, and as the single turret on a low hull design became standard, crews became standardized around a crew of four or five. In those tanks with a fifth crew member, usually three were located in the turret (as described above) while the fifth was most often seated in the hull next to the driver, and operated the hull machine gun in addition to acting as a co-driver or radio operator. Well-designed crew stations, giving proper considerations to comfort and ergonomics, are an important factor in the combat effectiveness of a tank, as it limits fatigue and speeds up individual actions.
World of Tanks
"World of Tanks" has five different types of vehicles: light tanks, medium tanks, heavy tanks, tank destroyers, and self-propelled guns. Each nation has at least one line of vehicles starting at tier I to tier X, players progress by playing games in vehicles in that line.