So far I've picked up:
Hotline Miami.
Left for Dead 2.
Chivalry: Medieval Warfare.
X-COM bundle.
I'm happy with my purchases, I would definitely recommend Chivalry for multiplayer shenanigans and a bucket full of a blood and gore, if you're into swinging swords and watching limbs being sliced off.
Left for Dead 2, for obvious reasons. Zombies and guns. I've played a little bit of Hotline Miami and it takes me back to a much simpler time I'm video games and I love it, it's a challenge but a fun one at that.
X-COM because I was bored and had money to spend. A good time kill and it's fun to shoot aliens.