Another Alice is Dead easter egg, suggesting they are in the same universe; and the submarine is a fish, which feature prominently in Alice. Also, computer screens apparently exist in Alice (they're all over) but not Hood, as my character here seemed confused to see them, yet there they are in the fish. Perhaps this is the "Above" and someone came through in the fish with Oystercloud...
 "Hood Episode 4: Memories"){kind=icon}
 "Hood Episode 3"){kind=icon}
 "Hood Episode 2"){kind=icon}
 "Hood Episode 1"){kind=icon}