D.E.P.T.H. C.H.A.R.G.E.

Welcome to D.E.P.T.H. C.H.A.R.G.E.! Which, naturally, stands for "Destroy Everything, Private! *Tee-Hee* Captain Has Accidentally Requested Giant Explosions!" It's up to you to fulfill Captain's orders and send those depth charges deep below to explode any and all nefarious submarines in the vicinity. But be careful - the fishies didn't do anything wrong, so make sure to let them do their thing. If you pull this off, you might just get some medals from Captain himself...