Call of Duty: Modern Warfare 2
November 10, 2009
One of the Unlockable emblems in the game is an 8-bit sprite of Price, clearly based on Mario's appearance in Super Mario Bros. It's unlocked after performing a 10-kill killstreak with no killstreak rewards equipped, and it's also available in Modern Warfare 3.
Additionally, in the map Estate a fictional video game console called a Gamestation 5 can be found in a house and one of the fictional video games lying around it is named "Italian Plumber Princess Rescue", referencing Mario games.
The creators of Call of Duty didn't own any right over Nintendo's Mario, but they only included a minor reference to the games.