SOS, known in Japan as Septentrion (セプテントリオン, Seputentorion), is a survival adventure video game developed by Human Entertainment and published in 1994 by Vic Tokai for the Super NES.

Mostly inspired by the 1969 book and 1972 film, The Poseidon Adventure, the game is set on September 13, 1921, and the players must escape the sinking ship Lady Crithania, which is hit by a gigantic wave and capsizes off the coast of Humbleton, England.

The game features four playable characters, each with a different story: The player must escape from the ship within a one-hour time limit.

The best ending for each character is obtained by escaping the boiler room, the final area of the game, with their sentimental person (Amy for Capris; Harry, Stella and Jack for Redwin; Ismay Carl Townsend for Luke; and Adela for Jeffrey) and over 25 "points" worth of survivors.

GamePro gave the game a mixed review, saying that the premise is compelling but marred by too many poorly-designed segments.