Here is the full list of all 10 Grave Keeper achievements.
Kill 5000 enemies
Kill 1000 enemies using melee weapon
Kill 1000 enemies using ranged weapon
Kill 500 enemies by critical
Destroy 500 objects
Use Ability Attack 250 times
Complete 100 stages
Kill 50 bosses
Use upgrade 500 times
Fight with Skeleton King 5 times