Full list of all 15 Magic: The Gathering - Duels of the Planeswalkers 2012 achievements worth 250 gamerscore.
The base game contains 12 achievements worth 200 Gamerscore, and there is 1 DLC pack containing 3 achievements worth 50 Gamerscore.
Defeat Koth in the Single-Player Campaign
Solve a Challenge
Defeat an Archenemy in a game
Host an Archenemy match on Xbox LIVE with two human teammates
Control three artifacts in a game
Cast a Mythic rare spell in a game
Defeat Kiora in the Single-Player Campaign
Defeat Chandra in the Single-Player Campaign
Defeat Gideon in the Single-Player Campaign
Defeat Karn in a campaign game
Solve Fifteen Challenges
Complete the Archenemy campaign
Host a match on Xbox LIVE as the Archenemy
Defeat Gideon, Garruk and Koth as the Archenemy in a campaign game
Defeat Jace, Jace and Jace as the Archenemy in a campaign game