Full list of all 30 Bloodforge achievements worth 400 gamerscore. It takes around 10-12 hours to unlock all of the achievements on Xbox 360.
Complete all challenge arenas
Collect all Rune Attacks
Destroy 10 friend's challenges
Decimate a friend's challenge
Defeat a challenge of the gods
Challenge a friend
Obtain 3 consecutive perfect battle ranks
Make the prophecy come true
Kill the messenger
Take control of Fate
Perform a 75-hit combination attack
Collect all weapon upgrades
Collect all health and mana upgrades
Resurrect Aerten 10 times.
Defeat a Risen Fomoiri Tank without being hit.
Discover the power of magic
Break Cailleach's heart
Use 5 different attack moves during an enemy encounter
Hold the top rank amongst all friends on 3 battles
Splatter Wodan's skull across the altar
Kill 10 enemies while they are bound with Crystals
Ingest 25 runes of power
Allow Balor to kill 15 of his own troops
Tear 25 enemies to pieces
Use the crossbow to link two attack chains together
Be the last thing Balor ever sees
Kill 5 enemies while completely enraged
Perform a perfect Rage Kill
Gruesomely kill an enemy while completey enraged
Destroyed 10 deadly warriors of the gods