Full list of all 12 Arkadian Warriors achievements worth 200 gamerscore. It takes around 8-10 hours to unlock all of the achievements on Xbox 360.
Equip a full suit of armor: Helmet, Armor and Weapon.
Destroy all monsters in a dungeon level.
Achieve a 10 kill chain.
Defeat 10 monsters while in Alter Ego form.
Complete 2 quests in one continuous co-op session.
Complete at least one quest with each character.
Kill 100 monsters using exploding vases.
Reach level 20 with any character.
Accumulate 500000 Gold.
Find 15 secret rooms.
Buy or sell 100 items.
Finish the game by beating the Gorgon.