BubbletUT, Non-Umod format.
BubbletUT is a new gametype for UT of the popular Bubblet! game out and about. It's a logic/puzzle game where you have a grid of bubblets to pop. Sounds simple, except that the more bubblets you have connected when you pop them, the more points you get for it.
Throw in 4 different modes of play, and you have a quite challenging (at times) simple little puzzle game. The modes are: