The Legends and Killers Pack Add-on for Red Dead Redemption has 10 achievements worth 100 gamerscore.
Reach level 50 and pass into Legend.
Complete all Tomahawk challenges in Single Player.
Get 25 Dynamite kills with Pig Josh.
Double capture 3 times in a single Gold Rush map.
Get 25 Deadeye kills with Red.
Kill 5 players via headshot in a single Shootout or Gang Shootout.
Kill 3 or more players in a standoff or showdown.
Come back from a 2-0 deficit and win a Hold Your Own game.
Get 3 kills with knives or throwing knives in a single competitive match.
Get a kill greater than 35 yards with a Tomahawk.