Credits: SPARTAN1171346
All purchases, whether they are mechas or guns, will be made through the Mechanic trader. Keep in mind that guns and mechas are sold separately, allowing you to equip your robot with the armament type you want—consider it a form of customization.
To make the experience even more fun, the world will be filled with appropriate enemies like drones and enemy mechas. These enemies will drop important parts, which can be exchanged with the Mechanic.