This page is about the 1980 arcade game. For the 1994 Super Nintendo Entertainment System game, see SOS (video game).SOS (エスオーエス, Esu Ō Esu) is a fixed shooter arcade game that was released by Namco in 1980. It was the third and final monochromatic title that was released by the company in the early part of that year; the first two were Navarone and Kaitei Takara Sagashi (originally developed by K. K. Tokki).