Here is the full list of all 18 Ruinarch achievements worth 1,000 gamerscore.
Poison a food object.
Abduct and imprison a Villager.
Capture a Triton.
Gain 1 Fallen Angel charge.
Create a Demon Cultist.
Destroy a Resource Pile.
Create a Psychopath.
Remove a Buff Trait from a Villager.
Kill an Elf.
Kill a Human.
Turn a Villager evil.
Share a crime intel.
Snatch an object.
Trigger a Villager's flaw.
Trigger a Villager's arousal.
Create a Poison Cloud through an Elemental Interaction.
Create a Frosty Fog through an Elemental Interaction.
Create a Ball Lightning through an Elemental Interaction.