Depthcharge

Depthcharge is a black-and-white submarine simulator arcade video game released in 1977 by Gremlin Industries. The game shows a side view of a section of ocean with a destroyer on the surface and submarines passing beneath it. The player-controlled destroyer can be moved left and right and drop depth charges to destroy the submarines below.

Gameplay
Up to four submarines may be present at any given time, each of which bears a score for destroying it that increases with its depth. Submarines release mines which the player-controlled ship must avoid by moving out of their path.

Similar arcade games

 * Periscope (Namco/Sega, 1965)
 * Sea Wolf (Midway, 1976)
 * Depthbomb (ディプスボンブ) (Sega, 1978)
 * Sub Hunter (サブハンター) (Taito)
 * Submarine (サブマリン) (Data East)
 * Deep Scan (Sega, 1979)

Clones

 * Depth Charge (Apple II, 1978)
 * Depthcharge (Commodore 64, 1983)
 * Sub Chase (ZX Spectrum, 1983)
 * Submarine (ZX Spectrum, 1984)
 * Depth Charge (ZX Spectrum, 1984)
 * Sub Hunt (Commodore 64, 1984)
 * Depth Charge (MS-DOS, 1984), text-based game
 * Sub Attack (Commodore 64, 1985)
 * Depthcharge (Amiga, 1994)