Platform: PC
Publisher: Astarte
Game: Yakyuken
Difficulty: Adjustable
Nudity: 4
Caveats: Bestiality, Futanari, Tentacles

A game based in the later seasons of Nanoha in which Hayate organizes a yakyuken tournament with all the girls. The game puts you in control of Nanoha as you face off against the other girls in yakyuken matches. Stripping them naked unlocks a sex scene featuring that girl; however, not all scenes are exactly vanilla lesbian sex.

This game is available from DLsite.