Serafuku Senshi Felis

Serafuku Senshi Felis
Platform: PC-88, PC-98
Publisher: Cocktail Soft
Game: Shooter
Difficulty: 3
Nudity: 4

You play the titular character as she pilots her Veritech-esque fighter jet to free her friends from the clutches of invading space vampires. As you clear each stage of each world, one of your girlfriends strips, a boss fight standing between you and seeing her naked. (What, you're expecting a reason?) Shops offer power-ups and allow you to repair your mecha before taking off again. Also, the game over scenes in each stage show you your heroine in different stages of undress depending on which level you're on. The game itself appears to be a poor rip-off of Gradius and the Macross shooters, and the enemies can fill the screen very quickly if you aren't constantly firing. I recommend running this game on as slow a processor as possible as well, as anything above 8 MHz makes it impossible to play.

Screenshots from the PC-98 version