Here is the full list of all 38 Die for Valhalla achievements.
Complete a level as a Valkyrie without possessing any Vikings
Only go right in one level
Finish a level without getting hit
Collect 100,000 glory
Collect 1,000,000 glory
Unlock all standard clans
Perform 20 Perfect Summons
Perform 100 Perfect Summons
Kill an Enemy as a Trap
Collect 15 skills on your Valkyrie profile
Collect 25 skills on your Valkyrie profile
On the upgrade screen, waste all your moves on empty spaces
Reach 500 points in any stat
Reach 1000 points in any stat
Kill 200 enemies with barrels
Perform a Multikill 100 times
Use your Viking's ultimate ability 20 times
Use your Viking's ultimate ability 50 times
Kill Troll
Kill Monstrous Spider
Kill Overlord
Kill Yog Sothoth
Successfully block enemy attack 20 times
Successfully block enemy attack 100 times
Deal 100,000 damage in a single level
Finish a level with a 100% hit ratio
Kill 500 enemies
Deal 1000 damage in a single hit
Kill 20 enemies with one Viking
Complete level as a Warrior without sending anyone to Valhalla
Complete level as an Archer without sending anyone to Valhalla
Complete level as a Berserk without sending anyone to Valhalla
Complete level as a Thrall without sending anyone to Valhalla
Complete level as a Jarl without sending anyone to Valhalla
Complete level as a Volva without sending anyone to Valhalla
Complete level as a Skald without sending anyone to Valhalla
Kill an enemy while possessing another enemy
Use 10 different Vikings to kill enemies in a single level