The following achievements and trophies are available to complete through the Undead Nightmare Collection disc.
Legends and Killers Pack
Axe Master - Complete all Tomahawk challenges in Single Player.
Call it a Comeback! - Come back from a 2-0 deficit and win a Hold Your Own game.
Double Bagger - Double capture 3 times in a single Gold Rush map.
Hail Mary - Get a kill greater than 35 yards with a Tomahawk.
Headhunter - Kill 5 players via headshot in a single Shootout or Gang Shootout.
Legendary - Reach level 50 and pass into Legend.
Original Gunslinger - Get 25 Deadeye kills with Red.
Reeeeal Good - Get 25 Dynamite kills with Pig Josh.
Stick and Move - Get 3 kills with knives or throwing knives in a single competitive match.
Who Needs Deadeye? - Kill 3 or more players in a standoff or showdown.
Liars and Cheats Pack
From Glue to Mon Dieux! - During a Grand Prix, finish a race in first after placing last in the previous race
Good Call - In a single Multiplayer Liar's Dice game, successfully make a spot-on call.
In a Van Down By The River - In a Multiplayer Poker game, win a hand on the last card when you were losing prior.
Legion of Boom - Get a triple kill while on the attacking team in Stronghold.
Master Exploder - Complete the Explosive Rifle Single Player Challenge.
One Die to Rule Them All - In a Multiplayer Liar's Dice game, win with only one die left.
Pa-Pa-Pa-Poker Ace - In a full Multiplayer Poker game, beat the table when blinds are at maximum.
Put the Posse On the Pedestal - Attain over 50,000 posse points in a single Free Roam session.
Triple Crown - Get first place In all Races In a Grand Prix In the Races playlist.
We Must Protect This House! - While on defense, do not allow the attacking team to capture any of their objectives.
Bonus Achievements for Xbox 360 only...
Avatar of Death - Successfully complete either round of a Stronghold map without dying.
Compulsive Liar - In a full Multiplayer Liar's Dice game, win without losing a single die.
Over 9001 - Attain over 9,001 points in a single Free Roam session.
Peacewalker - Finish a single race without getting shot or killed, and without shooting a bullet.
The Big Bluff - In a Multiplayer Poker game, win a hand by forcing someone with a better hand to fold.
Undead Nightmare Pack
Kingpin - Fight off 8 unique players during your reign on top during Land Grab in Free Roam.
Mad Marston: The Trail Warrior - Attain Rank 5 in all Undead Challenges.
Smoke that Skinwagon - Make it to wave 15 in Undead Overrun Gametype in Multiplayer.
Spinning Plates - Have every territory saved at the same time during the Undead Nightmare.
Zed's Dead, Baby - Attain 100% Game Completion in Undead Nightmare.
The Downward Spiral - Complete Curious Tales from Blackwater, USA” Survivor Mission.
Judge A Man By The... - Complete “Cure for Most of What Ails You” and “Get Back in that Hole, Partner” Survivor Missions.
The Superior Dance - Complete “Mother Superior Blues”.
All’s Right With the World - Complete “On a Pale Horse”.
Six Years In The Making - Find and kill a Sasquatch.
Chupathingy - Find and kill a Chupacabra.
Fan Service - Find and break a Unicorn.