The Mobile Field Bases are a unique feature not seen in any other Mechwarrior game. The player starts the game with three MFBs, although these can be destroyed. The MFBs travel with the player throughout the missions advancing when ordered to by the player. They carry all the player's supplies, which means there is a weight limit to the amount of supplies the player can keep. The MFBs can provide field repair and resupply provided they are carrying suffient armor and ammunition. As Mechs do not have shields, and are only protected by armor which is damaged in combat, the MFBs can become crucial in enabling the player to complete a mission.