Awesomenauts (50% Off)
Price: $4.99 (50% Off)
If you like cool things, like MOBA games with fantastic 2D art, Awesomenauts is certainly worth a try. The game's running a Free Weekend on Steam, meaning you can give it a try before buying. If it tickles your fancy, you can grab it half-price. Unfortunately none of the DLC is on sale, but give this one a swing if you're curious about how a side-scrolling MOBA might work.