Buy It On: Amazon
Number of Players: 2 - 5
The title isn't being facetious -- there's a downloadable timer app for the game, so every game is actually five minutes.
It's a fast and fun game where you and a few companions try to tackle the dungeon boss within the time frame allotted. Things get frantic and frenzied as the timer ticks down and you work hard as a team to reach the end.