Io-Interactive (commonly abbreviated to IOI) is a Danish video game development company currently owned by Square Enix. The company was founded in September 1998 by the Reto-Moto development group. To date, their most popular franchise is the Hitman series. This team is also known for their references (also known as an Easter egg) to their own games, such as Agent 47 advertising designer clothes in Freedom Fighters or Hitman: Absolution featuring Kane & Lynch.