As promised a few weeks ago when the Mac version of Left 4 Dead 2 was released, Valve has now finally given Mac owners a port of the original Left 4 Dead via Steam. Now Mac owners can check out the zombie co-op themed shooter series began and yes, Mac owners can play with their PC counterparts.

In order to celebrate, Valve has put both Left 4 Dead and Left 4 Dead 2 on sale once again for 50 percent off their normal prices. You can get Left 4 Dead and Left 4 Dead 2 for $9.99 each or get both games in a bundle for $14.99. In addition there's been some other bug fixes and changes for Left 4 Dead and a Halloween-themed community map added in Valve's servers called the Haunted Forest for Left 4 Dead 2. Finally Valve will be holding a Left 4 Dead panel at the first annual ZomBCon this weekend in Seattle.