The Trials of St. Lucia Add-on for Dante's Inferno has 10 achievements worth 250 gamerscore.
Beat 25 different single player and 15 different two-player EA trials
Earn 100 Bronze Medals and 75 Silver Medals Playing Community Trials
Rate Any 100 Trials
Earn 50 Gold and 25 Platinum Medals Playing Community Trials
Earn a Player Score of 250,000
Earn a Player Score of 100,000
Add 10 Trials to Your Favorites
Upload a 2P Lucia & Dante Platinum Trial
Receive a vote of at least 4-stars on any of your uploaded Trials
Upload a Single Player Dante Gold Trial