Tank
Most modern tanks most often have four crew members, or three if an auto-loader is installed. These are the:
Historically, crews have varied from just two members to a dozen. For example, pre-World War II French tanks were noted for having a two-man crew, in which the overworked commander had to load and fire the gun in addition to commanding the tank. First World War tanks were developed with immature technologies; in addition to the crew needed to man the multiple guns and machine guns, up to four crewmen were needed to drive the tank: the driver, acting as the vehicle commander and manning the brakes, drove via orders to his gears-men; a co-driver operated the gearbox and throttle; and two gears-men, one on each track, steered by setting one side or the other to idle, allowing the track on the other side to slew the tank to one side.
Tank Force
The gameplay is very much like that of "Tank Battalion", except that this time up to two (on an upright model) or four (on a cocktail) players can play simultaneously, there are seven new ("regular") types of enemy tanks (Normal Tanks, Speed Tanks, Hard Tanks, Big Tanks, Rapid Tanks, Tomahawk Tanks and Jeeps) and there is fifteen types of powerups (Bonus 500, 1000, 2000 and 3000, Shot Powerup, 4-Way Shot, Hyper Shot, Ripple Laser, Twin Shot, Small, Shield, Bomb Attack, Timer Stop, Force Field and Extend) which appear for players to collect in order to increase their tanks' firepower and boost their score (the one with the highest at the end of any round conquers its hexagon on the overworld map); each round is also the size of 17x13 blocks instead of just 13x13 off "Tank Battalion" and "Battle City", the enemies also roll into view from the top of the screen instead of just appearing and can also enter from the left and right sides, every fourth round is a "boss" round where the players must fight Train Cannons, AK Tanks and Boss Cannons at the top of the screen as well as the round's regular enemies, the players cannot destroy their own headquarters walls, when one player shoots another they will be pushed back (instead of getting stunned for a few seconds), and the game has an ending which will be seen after clearing all thirty-six rounds. The game's seventeenth round is also made to look like "Pac-Man" - even though Tōru Iwatani had no involvement with the title.