Crooked Frames is a stealth puzzle game about an art thief who cannot walk past a crooked painting. The player sneaks through museums at night, levels each frame with touch controls, and stands still when a guard turns around. The game has a training night, three museums and a final heist, four kinds of guard, and 99 public-domain paintings by artists including Van Gogh, Monet, Hokusai and Vermeer.