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 Odin without taking any damage.
Defeat Odin without destroying any spears
Defeat Odin in under 60 seconds.
Defeat Odin without using any God Powers.
Defeat Odin, the Allfather.
Defeat Kaunan without taking any damage.
Defeat Fé without taking any damage.
Defeat Fé without attacking her in melee.
Defeat Fé in under 25 seconds.
Defeat Fé without using any God Powers.
Defeat Fé, the magnificent Cave jotun.
Find all of the God Shrines.
Defeat Kaunan while at less than 10% health.
Defeat Hagalaz without taking any damage.
Defeat Kaunan in under 80 seconds.
Defeat Isa without taking any damage.
Defeat Isa in under 60 seconds.
Defeat Isa using only the icebergs.
Defeat Hagalaz without knocking her down.
Defeat Hagalaz in under 60 seconds.
Defeat Jera without taking any damage.
Defeat Jera in under 25 seconds.
Defeat Jera without using any God Powers.
Defeat Jera without killing a single vine.
Defeat Kaunan without using any God Powers.
Defeat Kaunan, the terrifying Fire jotun.
Defeat Isa without using any God Powers.
Defeat Isa, the mighty Winter jotun.
Defeat Hagalaz without using any God Powers.
Defeat Hagalaz, the mesmerizing Storm jotun.
Defeat Jera, the unmerciful Nature jotun.
Beat Valhalla Mode.
Beat Valhalla Mode without taking any damage.
Beat Valhalla Mode without using God Powers.