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