The HITMAN Legacy: Colorado Add-on for HITMAN 2 has 7 achievements worth 90 gamerscore.
Complete Freedom Fighters.
Ram Rose and Parvati, make Berg blow himself up and drown Graves.
Yee-haw to the hoedown.
Complete all Mission Stories in Freedom Fighters.
Complete Level 5 of an Escalation Contract set in Colorado.
Select a Starting Location and use an Agency Pickup to smuggle an item into Colorado.
Reach Colorado Mastery Level 20.