Valve announces preorders of Left 4 Dead 2 are now being accepted, revealing that preorders on Steam get a 10% discount off the MSRP of the co-op zombie shooter sequel, and they are also discounting the Left 4 Dead four-pack and the Left 4 Dead bundle. The rest of the announcement repeats what we already know about early demo access and the exclusive baseball bat weapon: "Starting now, those who pre-order L4D2 from participating retailers (PC, Xbox 360) or via Steam (PC) will receive early access to the Left 4 Dead 2 demo (currently targeted for October 27) plus an exclusive in-game item - the American baseball bat, one of the 10 new melee weapons included in the game."