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