Untouchables

Untouchables
Untouchables is an acheivement for the Xbox 360 version of Left4Dead.

Summary
No Survivor takes any damage after contacting the rescue vehicle.


 * If a survivor is pinned by a Hunter or grabbed by a Smoker, if they are saved quickly, they will not receive any damage, and the acheivement can still be obtained.


 * If a survivor takes falling damage, friendly fire, or fire damage, the acheivement cannot be gotten.

Tips
Use of the glitch ledge on the Rooftop Finale in the No Mercy campaign is a far easier way to get the acheivemtn rather than using just skill and plain luck.