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