Here is the full list of all 93 Renfield: Bring Your Own Blood achievements.
Use the special attacks of at least 10 different characters at least once.
Defeat Bella Lobo using Teddy Lobo once.
Finish 3 stages with Mark.
Collect a total of 20000 Big Bugs
Finish Livespring High using Cheerleader 5 times.
Finish Livespring High using Cheerleader 3 times.
Kill a total of 150000 enemies
Collect 500 artifacts
Collect a total of 10000 Big Bugs
Collect 1000 Moneybags
Finish Livespring High using Cheerleader once.
Use the special attacks of at least 5 different characters at least once.
Finish 7 consecutive rooms without being damaged
Finish 12 consecutive rooms without being damaged
Finish a stage with Mark.
Kill a total of 75000 enemies
Collect a total of 5000 Big Bugs
Use 1000 powerups
Retrieve Escapee
Die ten times
Collect 500 Moneybags
Use 600 powerups
Finish 3 consecutive rooms without being damaged
Collect 200 artifacts
Summon Familiars 10 times.
Deal 1,000,000 total damage using weapons
Kill a total of 500 enemies using Special Attacks
Use 300 powerups
Finish a stage with Rebecca Quincy.
Summon Familiars 5 times.
Deal 500,000 total damage using weapons
Collect 200 Moneybags
Use 6 unique powerups
Retrieve Cheerleader
Collect 75 artifacts
Consume 5 Egg Heads within a single run
Consume 7 Egg Heads within a single run
Consume 10 Egg Heads within a single run
Finish a Boss fight within 150s
Finish a Boss fight within 100s
Finish a Boss fight within 50s
Complete 10 challenge rooms.
Deal 200,000 total damage using weapons
Die five times
Complete 5 challenge rooms.
Summon a Familiar for the first time.
Complete 3 challenge rooms.
Use 3 unique powerups
Die one time
Use 1 unique powerup
Kill a total of 300000 enemies
Finish 3 rooms with less than 20HP
Finish 5 rooms with less than 20HP
Finish 12 rooms with less than 20HP
Retrieve Dollymop
Kill a total of 1000 enemies using Special Attacks
Kill a total of 1500 enemies using Special Attacks
Finish a level without picking up a powerup
Finish 4 levels without picking up a powerup
Finish 7 levels without picking up a powerup
Finish 3 stages with Rebecca Quincy.
Finish 5 stages with Rebecca Quincy.
Defeat Dracula using Robert once.
Defeat Dracula using Robert 3 times.
Defeat Dracula using Robert 5 times.
Defeat Bella Lobo using Teddy Lobo 3 times.
Defeat Bella Lobo using Teddy Lobo 5 times.
Do the Kill Route using Dracula 3 times.
Do the Kill Route using Dracula 6 times.
Do the Kill Route using Dracula 9 times.
Defeat 1 Boss using Sister Charlotte.
Defeat 3 Bosses using Sister Charlotte.
Defeat 5 Bosses using Sister Charlotte.
Finish 5 stages with Mark.
Finish a stage with Sun-Kissed Dracula using Sunlight 3 times.
Finish a stage with Sun-Kissed Dracula using Sunlight 6 times.
Finish a stage with Sun-Kissed Dracula using Sunlight 10 times.
Finish Dracula's Castle with 4 different characters.
Finish Dracula's Castle with 8 different characters.
Finish Dracula's Castle with 12 different characters.
Defeat Dracula using 3 different characters.
Defeat Dracula using 5 different characters.
Defeat Dracula using 7 different characters.
Use the special attacks of at least 15 different characters at least once.
Finish Murder Room with 4 different characters.
Finish Murder Room with 8 different characters.
Finish Murder Room with 12 different characters.
Reach Wave 70 in Endless Mode with 3 different characters.
Reach Wave 70 in Endless Mode with 6 different characters.
Reach Wave 70 in Endless Mode with 9 different characters.
Complete one level in Nightmare mode.
Complete three levels with at least 3 different Nightmare Conditions.
Complete five levels with at least 3 different Nightmare Conditions.