Here is the full list of all 18 Void Gore achievements.
Reach hell 12
Reach a score of 50,000
Kill 500 foes
Collect 2,000 coins
Collect 32 upgrades
Reach a score of 10,000
Collect 18 upgrades
Reach a score of 5,000
Collect 500 coins
Kill 64 foes with your shield
Collect 6 upgrades
Reach hell 6
Kill 100 foes
Kill 32 foes with your shield
Collect 100 coins
Kill 12 foes with your shield
Kill 10 foes
Reach hell 3