Brothers is an awesome little indie game on the Xbox Live Arcade. In the game you play both brothers simultaneously. The right analog and trigger control the little brother, while the left analog and trigger control the big brother. It's a cool concept and is executed very well, with plenty of puzzles and challenges to face, and each brother having different abilities. For instance, one of the easier early puzzles involves a cliff face that neither can reach the top alone, but with a coiled rope at the top. Big brother can hoist little brother up to the top, so that he can drop the rope down for big brother.
The act of controlling both at once can get awkward for some, all I can say is that I've had plenty of practice playing the animal catchers on the Animal Crossing mini-game in Nintendo Land on the Wii U. Same idea there... two catchers, each controlled by his own analog stick and trigger.
One fair warning: the game was designed in Sweden... and if you're not familiar with Scandinavian games, they tend to be quite depressing (when compared to American games). I still heartily recommend.
I've also started playing Mass Effect again. I've played through them as a goodie-good Captain America soldier-type, now I'm playing through as a Captain Janeway (Star Trek Voyager) type (the soldier-biotic hybrid class). It's much more fun playing through as a hard-ass... although Garrus still seems to think he can sneak off to wank when he thinks I'm not looking...