Here is the full list of all 48 Vampire Hunters achievements worth 1,000 gamerscore.
Reach level 18 in Classic Mode
Earn 3000 coins in a single run in Classic Mode
Fill 50 entries in the Collection in Classic Mode
Slay 2 enemies with a single shot 100 times in Classic Mode
Hunt the Batilla
Hunt the Titan
Equip 10 primary weapons, 2 secondary weapons, 2 passive weapons in Classic Mode
Slay the Skubalam
Reach combo level 2000 in Classic Mode
Wield 10 different primary weapons at once in Classic Mode
Win Colonnade in 4 minutes or less
Win The Great Hall in 5 minutes or less
Get mowed down by monsters in Survivors Mode
As the Engineer, have all 4 turrets active at the same time
Survive 10 minutes in a run in Survivors Mode
Hunt a Kappa Egg before it hatches
Acquire a Unique relic
Survive 15 minutes in a run in Survivors Mode
As Paladin, have 90% armor in a single run
As Reaper, reach level 100 in a run
Capture the 3 runes at the same time in Karzordoom
Survive 20 minutes in a run in Survivors Mode
Survive 8 minutes in a run with the Leo and Taurus Constellations
As Scout, survive for 20 minutes using the Leo constellation and at least one Batbat
Win a level with at least 5 active Constellations
Win a level with the Cetus Constellation in Survivors Mode
Finish all Classic Mode stages
Win with Orion constellation activated in Survivors Mode
Survive for 1 minute with The Ghost chasing you
Slay 6 bosses with a single Blood Rush
Win with Taurus and Chameleon constellations activated in Survivors Mode
Hunt at least one of every non-boss enemy
Win with Cetus, Orion and Hydra constellations activated in Survivors Mode
Place the last Ankh 5 seconds before The Ghost shows up
Hunt the Count using the Hercules Constellation, starting at the Brotherhood Chateau
Win a level in Survivors Mode
Finish a map while being at level 1, using manual level up
Survive 45 minutes in a run with the Carina Constellation (Endless Mode)
Reach level 200 with Scout
Reach level 200 with Paladin
Reach level 200 with Berserker
Resurrect 3 times in the same run and win
Reach Score 3,500,000 on any map
Reach level 200 with Reaper
Reach level 200 with Engineer
Reach level 200 with The Count
Reborn four times
Hunt The Count