The Premium Deluge Pack Add-on for Crackdown 2 has 10 achievements worth 250 gamerscore.
Win a public match of Capture the Orb in every arena.
Kill 60 Freaks in 60 seconds using the blades on the helicopter.
Destroy 10,000 wave enemies in Deluge.
Kill 10 Freaks in 30 seconds by shoulder charging.
Achieve 5x Combo, Blast, and Air in Deluge.
Play Deluge with Project Sunburst enhancements or with someone who has this achievement.
Survive the Deluge for 15 minutes in every arena.
Score 1,000,000 points in any Deluge arena.
Complete all 50 waves of a Deluge arena.
Score 20,000 points in 1 minute in any Deluge arena.