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