Here is the full list of all 30 My Time at Sandrock Online achievements worth 1,000 gamerscore.
Reach Level 60.
Obtain 1 diamond.
Have a romantic relationship with any character.
Complete 100 Personal Commissions
Complete the Hazardous Ruins Trial 20 times.
Unlock 50 backpack slots.
Chat 200 times.
Give 100 gifts.
Make friends with 10 people.
Won first place in the ghost hunting event.
Won first place in the dance contest.
Get 500 Game Center coins.
At Winter Solstice, cook 20 skewers of barbeque.
Nab 10 gifts on the Day of the Bright Sun
Catch a rare fish for the first time.
Have 20 duels.
Defeat 20 elite monsters.
Clean up trash 50 times.
Kick something from trees 50 times.
Pick up feces 30 times.
Give a hated gift.
Win at cards 20 times.
Successfully made 10 different dishes.
Run out of stamina 1 time.
Walked over 100,000 steps.
Stayed up late 1 time.
Take 20 photos.
Ordered food 20 times.
Play Mahjong once.
Get a haircut or makeover 1 time.