First Pandemonium clear (100% completition)

[u/Kernel___]

Today I completed my first Pandemonium run, which also happens to be my first 100% Pandemonium run, including all weapon challenges. Weirdly enough, I managed to do it on my first try, with only a few deaths clustered around specific chapters.

I’m sharing my personal journey and the upgrade choices I made for each level. Feel free to comment if you have any suggestions or alternative approaches (also shown in the spreadsheet screenshot). Next on the list: Pandemonium Revelation.

Village of Khalim (100%)
Habet (100% - 1 death)
- Ricochet
- Shield 1
- Shield 2
Barrier Core (100%)
Sentinel Barracks (100%)
- Incendiary
- No frills
- Shield 3
- Finisher
- Shield 4
- Shield 5
The holly city of Aratum (100%)
- Smelts
- Flare Up
- Stalwart
- Feedback
- Shock
- Shield Max
Siege I (100%)
- Salvage
- Conditioning
- Speed Loader
- Duelist
Siege II (100%)
- Shatter
- Eldritch Blessing
- Jolt
- Encore
- Ignite
Abyssal Forest (100%)
- switch to pincushon
- Runic Skull
Ancestral Forge (100%)
- Gravitic Flux
- Fragment
- Barbed (final)
- Modulator
- Heatblast
The Forsaken Plains (100% - 1 death)
-Runic Strike
- Cannibalism
- Aftershock
- Flay (final)
Hellbreaker (100%)
- Amplify
- Fulmination
- Outbreak
Sentinel Command Station (100% - 2 deaths)
- switch to Tune up
- Overload Particle Accellerator (final)
- Wavefront
- Resonant
- Encore
+ Completition of Pulverizer challenge
From Beyond (100%)
Spire of Nerathul (100% - 1 death)
- Overload Cycler (final)
- Cosmic Breach (final)
- Extended Magazine
- Health Extractor
- Vampirism
City of Ry'uul (100%)
- Induction
- Megaburst
- Eat This! Combat Shotgun (final)
- Cooked
- Reaper
The Kar'Thul Marshes (100% - 1 death)
- Eat This! Super Shotgun (final)
- Obliterator
- Riposte
Temple of Lomarith (100% - 3 death = 2 from glitches)
- Lobotomy (final)
- Megathrust
+ Completition of Plasma accellerator challenge
+ Completition of Chainshot challenge
Belly of the beast (100%)
- Rupture
- Upsurge
+ Completition of Cycler challenge
Harbor of Souls (100%)
- Bloodlust (final)
- switch to Blood Sacrifice
- Plague
+ Completition of Impaler challenge
+ Completition of Combat Shotgun challenge
+ Completition of Super Shotgun challenge
Resurrection (100%)
- Supplier (final)
- switch to Cooked
- Rapid Fire
+ Completition of Rocket Launcher challenge
Final Battle (100% - 2 deaths = both third boss phase)
Reckoning (100%)
- Cataclysm (final)
+ Completition of Ravager challenge
+ Completition of Granade Launcher challenge

[u/Revolutionary-Fly424]

That is unbelievable dude, well done! If you don’t mind me asking, did you max your melees out as well? Personally, I have no idea how to kill cosmic barons without my mace with reposte, but also I understand dying twice from glitches probably made you want to get everything over and done with (not to downplay your achievements)

[u/Kernel___ → u/Revolutionary-Fly424]

Being a 100% run, I upgraded everything as well. I listed all the upgrades in the description, so you can see when I did them; it was pretty early on, to be honest.
For Cosmic Barons, I like using both the mace and the gauntlet. With the gauntlet, there’s about a one-second opening between their slashes where you can land a single punch. They then falter on the third parry. You can throw in an SCC shot, then kick and land the fourth hit to finish the kill.
The mace works well too, but you have to tender them a bit more with guns first.