Full list of all 42 ScourgeBringer achievements.
The base game contains 26 achievements, and there are 2 DLC packs containing 16 achievements.
Find the NEXUS computer
Complete a Realm without getting hit
Beat a Judge without getting hit
Fully unlock four branches of the skill tree
Build a x3 combo with the Ultra Combo Altar
Beat the Judge of The Wasted Pit
Fully unlock three branches of the skill tree
Stun an enemy by throwing another enemy on it with the Smash
Fully unlock two branches of the skill tree
Beat the Judge of The Still Bastion
Max out your HP to 20
Fully unlock a branch of the skill tree
Get all items from Greed
Beat an enemy by throwing back a bullet at it with the Smash
Build a x2 combo
Beat the Judge of The Entangled Ingress
Clear a room without touching the ground
Fully explore a Realm
Make the world cucumber-free
Pick your first Gift of Blood
Clear your first fight
Beat the Judge of The Living Walls
Fully unlock five branches of the skill tree
Find all logs of Expedition #1
Find all logs of Expedition #2
Find all logs of Expedition #3
Successfully finish your first challenge room
Beat the Judge of The Old World
Fully unlock six branches of the skill tree
Find a secret room
Beat the Ordeal will all rooms of every Realms explored
Fully unlock all branches of the skill tree
Beat the Ordeal without any health bonus (nor item, nor blessing)
Beat the Ordeal without picking any Blessing
Read all the steles
Beat the Ordeal with a score of at least 3 Chaos
Beat the Ordeal with a score of at least 5 Chaos