"Undead Hunter outfit
Complete the "Birth of the Conservation Movement" Survivor Mission.
Complete the "Filth and Light Entertainment" Survivor Mission.
Complete the "Missing Souls" Survivor Mission.
Bring one "Missing Person" to El Presidio alive. - They are set up like bounties from the original game.
Find and break the mythical unicorn. - You have to first find and kill the legendary Chupacabra in order for the unicorn to appear."
"Legend of the Apocalypse outfit
Complete all of the Undead Nightmare Ambient Challenges. There are 5 levels to each challenge."
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