Here is the full list of all 24 Teslagrad 2 achievements.
Defeat Elenor
Get all achievements
Defeat Galvan
Complete the game
Collect all Cards
Collect 80 Cards
Collect 70 Cards
Get the secret map
Get the blink axe secret power
Collect 60 Cards
Get the directional blink secret power
Get the double jump secret upgrade
Collect 50 Cards
Get the red polarity secret upgrade
Collect 40 Cards
Collect 30 Cards
Collect 20 Cards
Defeat Halvtann
Defeat Fafnir
Defeat the First Draug
Collect 10 Cards
Collect 5 Cards
Defeat Huldr
Collect 1 Card