Blogger Tyler McVicker reported that a prototype has appeared online. Left 4 Dead based Counter Strike: Source. It’s called Terror Strike.
The prototype only has one map, Zombie City, where a team of 4 players must fend off waves of opponents using only melee. Note that the prototype can be downloaded here, it has been completed and published by the user wolfcl0ck. This version is a mod for Counter-Strike: Source.
Terror-Strike was used as a showcase for Turtle Rock’s first Left 4 Dead. But Valve itself was already involved in the sequel.
You can download the modification here. Aroma Shooter, a device for transferring scents from movies and games, will be available for purchase soon
Source: VG Times