Here is the full list of all 17 A Date with Death achievements.
Water your plant.
Create your first MC!
Interact with your favorite furry (or otherwise) pet as soon as possible.
Complete day 1.
Complete day 2.
Complete day 3.
Complete day 4.
Complete day 5.
Complete day 6.
See the 'wedding' end.
Don't trust Grim.
Lose the bet.
Win the bet.
Show great patience.
Have your sprout grow beautiful flowers.
Learn your neighbors secrets.
Kill your plant by day 7.