In Hydra, thieves are trying to steal the treasures from a museum which contain secrets to a weapon, and it is up to the player to stop them.

[3] The obstacles are gun embankments, enemy crafts and other nuisances that will slow the player down and may cause the cargo to be dropped and float downstream which will need to be retrieved.

[4][3] At the end of each level, the player drops off the cargo and can buy upgrades from a shop to improve the Hydra speedboat.

[5] Developed by ICE Software and published together by Domark and Tengen, Hydra was ported to the Amstrad CPC in Europe the same year as the arcade original.

Robert Jung reviewed the Atari Lynx version of the game which has been published on IGN.