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