In an unmitigated display of awesome, Stephan Botha has unleashed the hax on his L4D2 Demo and shared it with us all. The small plugin allows you to test drive the new (and old) infected in Versus mode.
It doesn't work quite like normal, you spawn instantly like in the finale and you appear to not count in the load out because multiple infected's of the same type will spawn as well. But at least you can practice with the new infected, personally I was wondering how the hell they would play (especially the Jockey) but Valve being Valve, they play very well. The Jockey pounces similar to a hunter but shorter, standing and it recharges almost instantly, the Charger operates pretty much as you would expect and is FREAKING AWESOME! And the Spitter again works as you would expect, and is not very fun at all against bots...
Heres a couple more screenshots of the other Specials "hands"
To get your hands on this awesome mod, head over to here:
Left 4 Dead Mods