with ladder) and a bus. Nonetheless, most of the tanks are more traditional, such as a German Panzer, or two anti-aircraft tanks. While the different tank models are generally similar in practice, they each have slightly different innate characteristics. The tanks can not only be equipped, but also customized on a very sophisticated level. Players select and purchase primary guns (referred as MAIN—limited in ammunition), secondary guns (referred as SUB or Sub Gun—unlimited ammunition) and special-purpose weaponry (referred as SE or Special Equipment—very limited in ammunition). Each item includes a weight value, with the tank's engine only able to drive a certain total amount of weight. As such, a balance must be struck, since every unit of weight not used for weaponry can be used to add additional armor tiles. Furthermore, money can be spent to modify each part of the tank, e.g., to increase the amount of ammunition which a given weapon carries (again at the cost of a further weight increase). Vehicle parts are categorized into several different categories: Chassis: The vehicle chassis. This is the outer casing that holds everything together. Different chassis offer different levels of protection and speed (FAVs will offer less protection but the highest speed, whereas main battle tanks will offer the highest degree of defense at a lower mobility). Engine: The engine determines the maximum loadout for the vehicle. The lower the rating, the less tonnage that the engine can handle. Engines do not affect the mobility of the vehicle. C Unit: The computer unit enables vehicles to be handled by a single crew member. Without it, the vehicle cannot function, as it combines various aspects of vehicle controls, such as weapons systems, so that a single crew can operate the vehicle. It is mentioned by one of the NPCs in the game that a vehicle can be operated without a C Unit although that would require three people to operate the vehicle. C Units also provide additional defenses for the vehicle, which is combined with the defensive rating of the chassis to form the total amount of defense rating of the vehicle. Accessories: Accessories are optional components for vehicles that are not required for the vehicles to operate. They range from Teleporters, which allow the players to travel between towns and get them out of hostile area (such as tunnels and dungeons crawling with enemies) to decorative decals to special add-ons