Steam is continuing to sneak in some sales and some pre-orders this week. In terms of price cuts, Steam users can get 10 percent off the just released first person shooter Darkest of Days until September 15. Also the upcoming Popcap casual game Zuma's Revenge, due out on September 15, has a 10 percent discount of its own until its release.

Also on sale until tomorrow is the recently zombie shooter Nations Red for 25 percent off its normal price. If you buy the game via Steam you also get an exclusive level and two unique weapons. Also a new Strategy First game collection containing 29 titles is on sale for a mere $49.99. Finally the upcoming fantasy RPG Time of Shadows, due out on September 11, has a 10 percent price cut on its pre-order.