Full list of all 15 Crimson Alliance achievements worth 250 gamerscore. It takes around 12-15 hours to unlock all of the achievements in the base game.
The base game contains 12 achievements worth 200 Gamerscore, and there is 1 DLC pack containing 3 achievements worth 50 Gamerscore.
Unleash your Ultimate attack.
Kill 25 enemies with explosive barrels in a single level.
Earn a gold medal on Fall of Byzan with each character class.
Revive yourself while playing alone.
Max out any character stat.
Carry the present out of Palace of Death on at least hard difficulty.
Find and collect all 33 Soul Anchors.
Achieve a score multiplier of 8X on at least normal difficulty.
Defeat Gashadokuro, the Death Knight.
Complete Requiem.
Defeat the Soul Siren.
Earn a gold medal or better on every Main Campaign level on at least normal difficulty.
Survive Fistful of Coins wave 7 on at least normal difficulty.
Complete Dead Among Us.
Complete Inferno.