Here is the full list of all 36 Jotun achievements.
The base game contains 33 achievements, and there is 1 DLC pack containing 3 achievements.
Beat the game 100%.
Find all of Ithunn's Apples.
Defeat Isa using only the icebergs.
Defeat Hagalaz without using any God Powers.
Defeat Kaunan while at less than 10% health.
Defeat Odin in under 60 seconds.
Defeat Odin without destroying any spears
Defeat Isa in under 60 seconds.
Defeat Kaunan in under 80 seconds.
Defeat Fé without attacking her in melee.
Defeat Fé in under 25 seconds.
Defeat Jera in under 25 seconds.
Defeat Hagalaz in under 60 seconds.
Defeat Hagalaz without knocking her down.
Find all of the God Shrines.
Defeat Jera without using any God Powers.
Defeat Jera without killing a single vine.
Defeat Isa without using any God Powers.
Defeat Kaunan without using any God Powers.
Defeat Fé without using any God Powers.
Defeat Odin, the Allfather.
Defeat Odin without taking any damage.
Defeat Odin without using any God Powers.
Defeat Hagalaz, the mesmerizing Storm jotun.
Defeat Hagalaz without taking any damage.
Defeat Isa, the mighty Winter jotun.
Defeat Isa without taking any damage.
Defeat Jera, the unmerciful Nature jotun.
Defeat Jera without taking any damage.
Defeat Fé without taking any damage.
Defeat Fé, the magnificent Cave jotun.
Defeat Kaunan, the terrifying Fire jotun.
Defeat Kaunan without taking any damage.
Beat Valhalla Mode without using God Powers.
Beat Valhalla Mode.
Beat Valhalla Mode without taking any damage.