Robot Entertainment (the studio behind Orcs Must Die!, Hero Academy, and, of course, the co-op tower defense/action RPG hybrid Orcs Must Die! 2) turns four years old this weekend! Congrats, guys! To celebrate, they're running a massive 75% off sale on their games and DLC. During this weekend, you can pick up Orcs Must Die! 2 for a mere $3.74 through their store! It'll provide you with a code that you can redeem through Steam (note that Steam itself is not offering this sale, so you'll have to go through the Robot Entertainment store for the discount).

With the recent success of the Halo Wars Demo even before the games release, many people wondered what would happen to Ensemble Studios, who officially announced their closure last month. Microsoft had taken steps to close down Ensemble after the release of Halo Wars, but the success of the developer means they weren't quite ready to go quietly.