ArmA 3's on sale for $30 right now, so if you've ever wanted to get your hands on it, now's a great opportunity to pick it up. If you're into Harvest Moon, Animal Crossing, etc., then consider picking up Stardew Valley. It's quite fun as it is now (assuming you enjoy this type of game), and soon they'll be out with a multiplayer feature. Goes on Steam for $15. Or you can grab Black Ops 3 for just a little under $40 right now. The Multiplayer component's free to play for 3 more hours from the time of this post, so you have a small window to try it out.