How to Kill Klaus
What I can recommend is:
- Upgrade the underwater shotgun to the maximum “Penta Axel”.
- Have max airtank upgrade (you probably have this by then).
- Spend a bit of time to find an O2 canister before the fight.
- If you’re lucky, you’ll also get a damage upgrade weapon box.
- Equip octopus charm (gun damage +15%) and the dolphin charm for dash speed or charm for damage reduction.
I basically face-tanked Klaus and just blasted him. In about 5 well placed shots, it was over in less than 20 seconds.
How to Find Klaus?
It’s actually only found on the Stormy night, you must have triggered a cutscene with a certain NPC.
The location of the vortex is all the way to the right edge of map, around 50m deep.