Original Special Infected
The Special Infected are notorious for the extreme mutations as opposed to their Common Infected counterparts. While Left 4 Dead 2's final release has different Special Infected designs, Left 4 Dead 1's Special Infected appearances were still present in the Left 4 Dead 2 E3 Demo, most likely due to decisions of updated designs being unfinished.
The Smoker
Left 4 Dead 1 design with no additional gameplay changes. This appearance was changed during the PAX Demo showcase.
The Hunter
Left 4 Dead 1 design with no additional gameplay changes. This appearance was changed during the PAX Demo showcase.
The Boomer
Left 4 Dead 1 design with no additional gameplay changes. This appearance was changed during the PAX Demo showcase.
The Tank
Left 4 Dead 1 design, damage ratios, and ruthless AI behavior. No adjustments to his playstyle and appearance were made until the PAX Demo showcase.
The Witch
While Left 4 Dead 2 introduced the "Wandering Witch", The E3 Demo still utilized the Sitting Witch playstyle along with its corresponding Left 4 Dead 1 damage ratios. There were no design changes.
Did You Know
Despite the consistency of Special Infected designs between Left 4 Dead 1 and the Left 4 Dead 2 Beta, Valve changed their appearances to better reflect the heated southern environment in which the sequel surrounds itself. For example, the Hunter can still be seen with its signature hoodie, however, with torn-up sleeves and boiled hands.
