Swordquest Earthworld is an action-adventure puzzle video game for the Atari 2600, released in 1982 as part of the Swordquest series. Players navigate a series of rooms themed around the zodiac signs, solving riddles and engaging in mini-games to collect items and progress. The game is notorious for its part in a gaming contest that involved real-world prizes and a planned comic book series tie-in. Its complex gameplay, blending of genres, and unique contest element mark it as a distinctive title from the early era of console gaming.