The game places a heavy emphasis on customization; the structure of the mecha the player uses in combat is standardized and modular, consisting of a number of interchangeable parts.

The player composes their mecha from parts they obtain by finding them in missions, fulfilling certain requirements, or by buying them from an in-game shop. Money is earned by finishing missions; typically each mission has a set reward for its completion from which deductions are made based on damage taken, amount of ammunition used, and completion time. Certain missions also offer bonuses for completing optional objectives.