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.
Defeat Odin in under 60 seconds.
Defeat Kaunan in under 80 seconds.
Defeat Hagalaz in under 60 seconds.
Defeat Isa in under 60 seconds.
Defeat Fé in under 25 seconds.
Defeat Jera in under 25 seconds.
Defeat Odin without taking any damage.
Defeat Odin without destroying any spears
Defeat Fé without attacking her in melee.
Defeat Kaunan without taking any damage.
Defeat Hagalaz without taking any damage.
Defeat Fé without taking any damage.
Defeat Isa without taking any damage.
Defeat Isa using only the icebergs.
Beat the game 100%.
Defeat Odin, the Allfather.
Defeat Odin without using any God Powers.
Defeat Hagalaz, the mesmerizing Storm jotun.
Defeat Hagalaz without using any God Powers.
Defeat Hagalaz without knocking her down.
Defeat Fé, the magnificent Cave jotun.
Defeat Fé without using any God Powers.
Defeat Kaunan without using any God Powers.
Defeat Kaunan while at less than 10% health.
Defeat Kaunan, the terrifying Fire jotun.
Find all of Ithunn's Apples.
Find all of the God Shrines.
Defeat Isa, the mighty Winter jotun.
Defeat Isa without using any God Powers.
Defeat Jera without taking any damage.
Defeat Jera, the unmerciful Nature jotun.
Defeat Jera without using any God Powers.
Defeat Jera without killing a single vine.
Beat Valhalla Mode without taking any damage.
Beat Valhalla Mode.
Beat Valhalla Mode without using God Powers.