The 7th Guest: Infection is a single-player casual puzzle game where players solve microscopic puzzles inspired by the original The 7th Guest game, featuring various difficulty levels and interactive taunts from the antagonist Henry Stauf. In this game, players navigate through a sci-fi horror-themed setting, engaging with intricate puzzles that challenge their strategic thinking and problem-solving skills. It stands out with its unique combination of horror and sci-fi themes, along with advanced gameplay elements such as multiple difficulty levels, taunting interactions, and multiplayer options including a Mono Y Mono mode for two players on the same device and a demo mode where AI controls both players.