Sink or Swim is a puzzle video game that was released in 1993 for MS-DOS Developed by Zeppelin Games. It is similar in style to Lemmings. The game was ported to the Amiga and the Super Nintendo Entertainment System. Sega Genesis and Game Gear versions were renamed to S.S. Lucifer: Man Overboard!.

Players control Kevin Codner, the aquatic hero. After hearing that the SS Lucifer has suffered some sort of mishap (the exact nature of the incident is not made clear in the game; somehow the captain is shown pulling the plug from his bath, and a fountain of water shoots up and starts flooding the ship). Kevin gets into a yellow submarine and begins saving the passengers.