You hear about dedicated gamers breaking world records all the time when it comes to speed runs and marathon gaming sessions, but the games themselves also manage to make it into the Guinness Book of World Record as well. Today we celebrate them.

Final Fantasy XII - Longest Development Period My favorite entry in the Final Fantasy series had a tortured development that lasted five long years, making it the current holder of the longest period ever spent on a single game. The delay was so long and hard that it significantly hurt Square Enix financially, and director Yasumi Matsuno was forced to leave the game over it before completion. The optional superboss Yiazmat was named in his honor.