for the update after the next one, i got some suggestions:
A drone launcher, launches drones that shoot 4 small missiles and bullets at the enemy.
katusha, A rocket turret that shoots a ton of missiles in a small amount of time like 50
Sun beam, A laser emmiter that shoots yellow beams, which are a lot stronger than the basic red ones
Cluster missile launcher, launches missiles that launch even more missiles
cluster flak launcher, A flak cannon that shoots flak bullets that explodes into a lot of flak bullets