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