Monaco: What's Yours Is Mine is a 2013 stealth video game developed by Pocketwatch Games in which players, alone or cooperatively, perform heists and robberies. Players choose from eight characters, each of whom has a unique and beneficial skill, such as the ability to change appearance or tunnel through walls. Monaco's single-player story is told in four acts from perspectives of different characters. The cooperative mode lets up to four players play together in different locations.

Lead developer Andy Schatz began developing Monaco while working for TKO Software. He later founded his independent company Pocketwatch, where he continued development and planned to release it as an Xbox Live Indie Game. While looking for playtesters, Schatz met Andy Nguyen, who became a level designer, producer, and promoter for Monaco. Pocketwatch Games released the game in 2013 for Windows, OS X, and Linux. Majesco Entertainment handled its Xbox 360 release after Microsoft Game Studios twice rejected the game. A Nintendo Switch version, Monaco: Complete Edition, was released in 2019 by Humble Games.

Monaco received positive reviews and won two awards at the 2010 Independent Games Festival. Critics praised its cooperative modes but considered its single-player gameplay inferior for lacking content. Frequently compared to heist films, reviewers praised Monaco's art style and how its minimalist design suited its gameplay. Austin Wintory's soundtrack also received praise. Pocketwatch announced a sequel, Monaco 2, in March 2022.

Monaco is a stealth video game played through a top-down perspective. It features single-player and cooperative modes, allowing up to four players to partake in heists and robberies. The game has four main campaigns for the player to complete, each through the perspective of a different character. Each campaign is split into individual missions. Missions take place in locations varying from nightclubs to yachts, with different obstacles and problems to solve. As players only have vision of areas within direct line of sight, they must traverse each mission strategically to navigate the fog of war shrouding the map. Players work together to complete the missions; if one player dies, another must revive them before finishing the mission. The campaign is offered in two modes: "Classic", which is the original and full-length story, and "Enhanced", which is a condensed version released in a later update. Outside of the campaign, Monaco has other game modes, including a zombie mode and player vs player maps.

There are eight characters, each with different traits and advantages; the Locksmith, the Cleaner, the Lookout, and the Pickpocket are available immediately, while the Mole, the Gentleman, the Redhead, and the Hacker must be unlocked as the campaign progresses. The Locksmith can open doors faster than other characters; the Lookout is able to see enemies who are not in the player's direct line of sight; the Pickpocket owns a coin-collecting monkey; the Cleaner can put guards to sleep; the Mole can dig through walls and open vents quickly; the Gentleman has the ability to temporarily change his appearance, making the player less detectable to enemies; the Hacker has the ability to upload computer viruses to security systems, shutting them off temporarily; and the Redhead can charm enemies into not attacking and making characters follow her. Players can select one character per mission, with different levels suiting different characters. However, each mission can be completed with any character, and the strategy depends on the chosen characters.

Players can find and use items in each mission, including smoke bombs and C4 explosives, as well as firearms including a shotgun and machine gun. These items are single-use, but can be replenished by collecting ten coins scattered around the missions. Items are not shared in the cooperative mode, meaning only the player who collects the coins receives the bonus.

The Locksmith is questioned by Inspector Voltaire about his recent actions with the Pickpocket, the Cleaner, and Lookout. The Locksmith describes the criminals' prison escape in Monaco alongside another inmate, the Mole. They meet the Gentleman while stealing passports and money to be smuggled out of the country. They board the Gentleman's booby-trapped yacht and try to leave the harbor; while doing so, the Gentleman receives an anonymous telephone call from a man he later identifies as Davide, after which the boat explodes. After receiving medical care at a hospital, the thieves help the Gentleman dispose of evidence from a previous heist and rescue his girlfriend, the Redhead. The group proceeds to steal valuables and hire the Hacker. While attempting to steal from a casino, they are caught by the police and taken back to prison.

The Pickpocket, next to be interviewed, recalls events differently from the Locksmith. He says the Hacker, the Redhead, and the Gentleman escaped with them. The Gentleman had experienced legal turmoil in his financial affairs, which drove the thieves to escape and retrieve the money. This intrigues Inspector Voltaire, who believed the money was used to smuggle them out of the country, whereas the Pickpocket claims that it was used to smuggle weapons. The Pickpocket reveals the crooks purposefully blew up the boat to distract Interpol. Later, Davide is believed to have been murdered at a nightclub until Inspector Voltaire receives a phone call revealing that Davide's DNA did not match any of the bodies. To further confuse the police, the thieves planted evidence with Davide's fingerprints at a different crime scene. After confessing this to Inspector Voltaire, the Pickpocket reveals he was a spy sent by Interpol. The Pickpocket claims the Gentleman has assumed Davide's identity and that if Inspector Voltaire attempts to confirm the story, the Gentleman will know one of his accomplices is a spy.