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