Steam has been a hotbed of good deals for years now and Co-Optimus does like to save a few pennies on a co-op game. The latest offer from Valve's juggernaut is a free week of Awesomenauts and the opportunity to buy it with 66% off.
The offer is only available until Sunday 15th September so if you are thinking about checking out the game, you best do it soon. It is worth it at only $3.39; we gave the three player local co-op mode 4 out of 5 in our Co-Optimus review.
360 owners should not feel too left out with the Steam bargain as their version of the game is also on sale as part of the Back to School Sale. It is slightly more expensive at $4.99, but still worth at least a try of the demo.