Left 4 Dead 2: PC $24 @ Amazon

[CompuDrew]

Left 4 Dead 2: PC $24.99 @ Amazon.com

Free shipping w/Prime

Edit - Or add another $1.01 worth of something to get free shipping.

2nd edit - Same price on Steam until Thursday @ 4p PST. Thanks Peanut Butter.
You can also get the 4 pack for $74.99 ($18.75 each!)

 

[Fafeifa]

great deal for those who don't have it, this is a much more complete game for the ones wondering if this is a DLC for l4d1

 

[Peanut Butter]

Also 24.99 on Steam until Thursday 4pm PST