Green Man Gaming is doing that thing it does again where it heavily discounts a worthwhile PC title that's redeemable on Steam and also offers a coupon code (GMG20-P4DLK-FKYRS) for an even greater deal. In this case, the game in question is XCOM: Enemy Unknown, which can be yours for $16 with that coupon applied.
You shouldn't need me to tell you it's worth grabbing at that price. Even as someone who has a hard time getting deep into most turn-based strategy titles, that didn't seem to matter with Enemy Unknown. That's the power of good game design, I suppose.
Also, when I say "tell your friends," what I'm really trying to get across is that you need to peer pressure them into buying this game they will likely enjoy but otherwise would not pick up on their own. Worked out quite well for me, anyway.