Here is the full list of all 47 Gift of Parthax achievements.
Complete the entire game without a single death
Complete entire game using only fire as primary element
Purchase all runes available
Gain blood magic
Complete a challenge with only frost spells equiped
Gain light magic
Complete a challenge with only fire spells equiped
After Parthax' death
Complete blood moon season
Complete a challenge with only Arcane spells equiped
Transform 10 enemies into chickens
Defeat Hrist
Defeat Parthax
Open a chest with riches
Collect 99 mana potions
Complete winter season
Damage more than 5 enemies with the effect of an explosive rune
Defeat Nereus
Open an empty chest
Collect 50 mana potions
Complete fall season
Defeat 1000 enemies
Find all objects for a season
Collect 20.000 gold
Collect 99 health potions
Collect 10.000 gold
Complete a challenge with only earth spells equiped
Died 10 times
Complete summer season
Collect 5.000 gold
Collect 50 health potions
Defeat 500 enemies
Defeat Feykir
Died 3 times
Collect 10 mana potions
Adding 4 of same kind of rune to a spell, first time
Destroy all breakable objects for a season
Collect 10 health potions
Complete spring season
First death
Defeat Mounorian
Read the introduction story
Defeat 100 enemies
Collect 2.000 gold
Purchasing first rune
Complete the tutorial
Casting first ally spell