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