Wanderer is a sci-fi adventure game combining card trading and space combat in a universe where cats have become a valuable currency. After the protagonist's feline companion is held for ransom, players navigate through various planets, engaging in a poker-inspired card game with alien civilizations while collecting cats as rewards. Between trading sessions, players pilot their ship through vector-graphic 3D space battles and black hole sequences, shooting down enemy vessels in first-person combat to progress through the story.