Here is the full list of all 35 The Eternal Castle REMASTERED achievements.
Find the mace
Finish without ever dying
Kill the Kranker
end the intro within 19.87 moments
Make the Kranker happy
Find the Grenades
Outrun the sniper
end game within 300.00 moments
Reach the Castle with the ship
Use Adam
Save the AI
Destroy the Guardian
Find the Sword
Crash the ship before reaching the Castle
Grab the God’s GLIDER
Kill the God with your fists
Grab the Sniper’s GLIDER
Find the hammer
Find the shotgun
Find the machine gun
Teleport to ship
Grab the Scientist’s GLIDER
Kill the Scientist and his Wife
Find the axe
Find the double barrel shotgun
Grab the Cyclops’ GLIDER
Find the gun
Use Eve
Finish the second run
Finish the third run
Find all available items
Find all GLIDER fragments
End the game at 100%
Unplug your friend
Unlock all achievements