Deep Rock Galactic: Survivor features a massive armory of weapons to help you squash swarms of ugly bugs. Each class starts a mission with a single weapon that depends on its class mod. Reaching levels 5, 15, and 25 during the mission will let you choose one of three randomly chosen weapons. The weapons available depend on whether they have been unlocked by completing certain milestones. In other words, the more weapons you unlock, the bigger the pool and the better options you get at levels 5, 15, and 25.