Not sure if anyone is interested in this, but apparently Steam is setting up free play this weekend for 10 of their games, after the weekend you'll have to pay for them, but there's promise of "substantial discounts". Not sure what that sort of discount would look like, but it'd be a good time to try any games you're on the fence about (if they're in the list). I'll be trying out Don't Starve and Injustice I think, and depending on the price might pick them up. Also if this is in the wrong thread, mods please move it
Awesomenauts
Blade Symphony
Company of Heroes 2
Don't Starve
Grid 2
Injustice
Killing Floor
Payday 2
Trine 2
XCOM: Enemy Unknown
Steam Free Weekend will have ten free games starting tomorrow - PC Gamer