Night Slave (ナイト・スレイブ) is an eroge run & gun role-playing shooter game released in 1996 for the NEC PC-98 computer.
The game's design and gameplay draws inspiration from the Assault Suits series, particularly Assault Suits Valken (1992), as well as the Gradius series. It also employs many action role-playing game elements such as permanently levelling up the mecha and various weapons using power-orbs obtained from defeating enemies as well as storyline cut scenes, which occasionally contain lesbian adult content.
The game's armaments system also employs recoil physics, while the gameplay is varied, including environments such as rainy jungles, snowy wastes, and alien bases.