Here is the full list of all 79 Scarlet Tower achievements.
Collect 1000 blood gems.
Survive 1 full day in Endless Mode
In Endless Mode, make it until nightfall without taking damage
Collect 20 Re-roll dice in a single run
Beat Corruption 10 with the Knife of Darkness in your Arsenal
Slain World Eater on Corruption 10 Leviathan's Lair.
Defeat 1000 Pink Jellyfish in Leviathan's Lair
Complete the Necromancer Quest
Win 5 matches using only magic weapons.
Collect 5 Equipment Banish in a single run
Beat the Scarlet Tower in Corruption 10
Win the Plaguelands Map in Corruption 9 with Veromus.
Win the Plaguelands Map in Corruption 9 with the Undine Familiar.
Win the Plaguelands Map in Corruption 9 with Lyah.
Win the Plaguelands Map in Corruption 9 with the Salamander Familiar.
Win the Plaguelands Map in Corruption 9 with Rhys.
Win the Plaguelands Map in Corruption 9 with the Hoot Familiar.
Win the Plaguelands Map in Corruption 9 with Lance.
Win the Plaguelands Map in Corruption 9 with Vylat.
Win the Plaguelands Map in Corruption 9 with Ninn.
Slain World Eater on Corruption 10 Plaguelands.
Win the Plaguelands Map in Corruption 9 with Allure.
Win the Plaguelands Map in Corruption 9 with the Jinn Familiar.
Defeat 1000 Brains in the Plaguelands
Defeat Vorax
Defeat Vorgron
Defeat 30 Silver Werewolf
Slain Flesh Demon on Plagulands.
Buy something exclusive to Infinite Mode from the Seller
Win a match without taking damage.
Slain World Eater on Corruption 10 Nightpine Valley.
Beat Corruption 3 Without Take any Damage.
Beat Corruption 9 before 22 minutes.
Defeat 800 Snowman
Defeat Krampus
Buy the 12 different flasks from the secret seller.
Collect 100 pieces of food
Buy 30 flasks from the secret vendor.
Slain Octopus on the Ocean.
Slain Angler Fish on Ocean.
Create 10 different weapon fusions.
Complete the Paladin Quest
Defeat more than 100,000 enemies
Defeat Puker 5x at Night Time.
Complete the Priest Quest
Help the Engineer
Upgrade Holy Bible to Rank V.
Defeat 500 Slimes
Defeat 500 Tentacles
Defeat Death at Corruption Level 1 or higher
Defeat 1000 Ghost Witches
Survive for 24 minutes.
Survive for 24 minutes at Woods of Havoc.
Search for the lost egg in the world.
Complete the Alchemist Mission
Defeat 5.000 Enemies at Night Time.
Find someone lost in the woods at nighttime.
Defeat 100 Carnivorous Plants
Survive for 15 minutes.
Defeat Puker at Night Time
Defeat 300 Ghost Witches
Upgrade Glacial Staff to Rank V
Complete the Blacksmith Quest
Complete the Elementalist Quest
Complete the Templar Quest
Upgrade Thunder Staff to Rank V.
Defeat 100 Goblins
Defeat 30 Slimes
Defeat 100 Zombies
Survive for 2 minutes.
Survive for 5 minutes.
Survive for 12 minutes.
Upgrade Frost Staff to Rank V
Upgrade Fire Staff to Rank V.
Defeat 300 Red Bees at daytime.
Complete the Bloodmancer Quest