Here is the full list of all 24 Dungeons & Dragons: Chronicles of Mystara achievements worth 400 gamerscore.
Complete Tower of Doom.
Complete Shadow over Mystara.
Kill 30 Enemies of Any Type.
Kill 300 Enemies of Any Type.
Kill 1000 Enemies of Any Type.
Complete all Tier 1 Challenges.
Complete all Tier 2 Challenges.
Complete all Challenges.
Gather all Treasures.
Gather 10,000 SP.
Reach Overall Player Level 5.
Reach Overall Player Level 10.
Reach Overall Player Level 20.
Complete 1 Challenge Tier of “Fry ‘Em Up”.
Complete 1 Challenge Tier of “Paralyzation Nation”.
Complete 1 Challenge Tier of “Slick Hammers”.
Complete 1 Challenge Tier of “Pointy Things and Slings”.
Complete all 3 Tiers of the Challenge “Till Death Do Us Part”.
Complete all 3 Tiers of the Challenge “Petting Zoo”.
Complete all 3 Tiers of the Challenge “Curb Stomp-A-Thon”.
Complete all 3 Tiers of the Challenge “So Desperate!”.
Complete all 3 Tiers of the Challenge “Loot Master”.
Complete all 3 Tiers of the Challenge “Spellcaster”.
Complete all 3 Tiers of the Challenge “Help Wanted”.