Blue Angel 69

Caution: subtlety not included. Blue Angel 69, released in 1989 for DOS, is basically what happens when a programmer tries to mix erotic art with a tile-based puzzle game and ends up somewhere between genius and “please don’t open this at work.” You match symbols, unlock pictures, and get rewarded with increasingly risqué pin-up art that would make even your Commodore blush. The gameplay is surprisingly clever—like Tetris’s scandalous cousin—and if you ignore the teenage-level titillation, there’s a real puzzle challenge here. Just… maybe keep the volume down. And don't let grandma walk in.