Gato (video game)
GATO is a real-time submarine simulator published by Spectrum HoloByte in the 1980s for several platforms, including DOS, Apple IIe and Atari XE Game System. It simulates combat operations aboard the Gato-class submarine USS Growler (SS-215) in the Pacific Theater of World War II. GATO was the first PC submarine simulator and the first simulator for the Apple Macintosh.
Gameplay
The player is tasked with chasing Japanese shipping across a 20-sector map while returning for resupply as necessary from a submarine tender. The islands on the map are randomly generated and not based on real-world geography. Combat is conducted using a screen with a view through the periscope and at various gauges and indicators. The game has multiple difficulty levels, the highest of which requires the player to translate mission briefings which are transmitted only as audible Morse Code.
An unusual feature in the DOS and Apple IIe versions allows the game to be paused and a spreadsheet shown on the screen; a boss key.