Here is the full list of all 12 Seed of Evil achievements.
My prrrrreciousssss.
Rescue the man in armor during the demon outbreak.
Get halfway through the cave.
Aid the woman in the dungeon.
Gardening is the art of watering.
Get a gift from the kind soldier.
Defeat the thugs in the slum's tent.
Solve the riddle.
Break out the imprisoned adventurer.
Recover the gem without helping the thieves.
Get the good ending.
Help the thieves in order to recover the gem safely/without fighting.