Smoke That Skinwagon

Unreleased

 is an achievement/trophy in the Red Dead Redemption Undead Nightmare DLC pack.

Description
"Make it to wave 15 in Undead Overrun Gametype in Multiplayer."

Trivia

 * The title of this achievement/trophy is a play on a quote from Wyatt Earp, as played by Kurt Russell in the film Tombstone.