Monaco: What's Yours is Mine is a fast-paced stealth game about theft. The game is played from a top-down view and levels are laid out as large, complex mazes often with multiple floors, combining open spaces with narrow corridors. Up to four players can work together as a team to infiltrate, steal and escape. Four character classes are available from the start, each with their own unique skills, and four other ones are unlocked over time. The unique abilities of a specific character can be expanded by choosing tools and weapons that are available to all characters regardless of the class. The game consists of two campaigns. After the first one has been completed, a remixed one can be played at a more challenging level. By going through the missions different storylines about the characters are told. The different storylines can be played in any order as they branch out when new ones are unlocked and the player can choose where to continue.