Here is the full list of all 80 Runestone Keeper achievements.
How dare you...traitor!
Kill an elite monster while stacked with 40 erosive effect
Having 9 tattoos!
Activate "Tyrant" Runeword and complete on any difficulty
Reach floor 21 in Abyss mode
Kill an elite monster while stacked with 20 cursed effect
Activate "Conqueror" Runeword and complete on any difficulty
Activate "Pagan" Runeword and complete on any difficulty
Complete with Azir on any difficulty
Complete with Merlin on any difficulty
Activate "Lucky" Runeword and complete on any difficulty
Complete with Balerio on any difficulty
Complete with Alexander on any difficulty
Believe in the God of Evil
Complete with Lilith on any difficulty
Activate "Spell Breaker" Runeword and complete on any difficulty
Complete with Dellamorey on any difficulty
Activate "Fresh Blood" Runeword and complete on any difficulty
Win against Ancient Memories
Reach all full upgrades
Reach floor 30 in Endless mode
Hero reach level 12
Kill an elite monster while stacked with 15 weakness effect
Be really vigorous
Kill 200 monsters in one go
Single strike cause more than 100 damage
Die from the Lich quest
Killed by a poison trap
Complete with Morte on any difficulty
Believe in the God of Vengeance
Complete with Hogg
Believe in the God of Devastation
Reach floor 20 without believing in any Gods
Collect 1000 coin in one game journey
Simultaneously sustain erosion, curse, toxin and weakness effect
Soul point reach 80
Complete with Svafa
Believe in the Goddess of Benevolence
Unlock Hogg
Be really vital
Ahhhhhhhhhhhhhhhhhhh
Interchange life percentage with a monster
Kill 15 elite monsters in one go
All attributes tuned to 5
Hero reach level 10
Believe in the Holy Contractor
Try heads next time.
Complete with Guy
Clear all arenas throughout the entire game in Normal mode
Win against Nightmare Fiend
Kill an Overlord monster
Betray two Gods in a row
It is your day.
Killed by an Overlord monster
Kill all the wizards in a Wizard dungeon
Unlock Svafa
Believe in the Goddess of Magic
Killed by a bomb
Kill a Screen Block monster
Betray a God
Find and clear an arena
Believe in the God of War
Use an altar
Forge a runestone
Light the torch in the tutorial
Reach one full upgrade
Believe in the God of Treasure
Believe in a God
Believe in the Guardian of Rock
Obtain a piece of rare equipment
Killed by a spike trap
Killed by a monster explosion
Die in an arena
Kill a ranged elite monster
Get through a dungeon without killing anything
Collect your first piece of runestone
Who's this little fella?
Die on 1st floor
And much more to be spilled!