Here is the full list of all 29 BuriedTown achievements.
Get through the autumn
Get through the winter
Get through the spring
Get through the summer
plant 50 potatoes
make 25 pieces of meat
make 100 water
make 50 bottles of vodka
make an AK47
make an Anti-riot suit
make a katana
make a camelbak
Meet Mr. Luo
Friendship with Mr.Luo increases to 100%
Meet Jeff
Friendship with Jeff increases to 100%
Meet Dr. Jean
Friendship with Dr. Jean increases to 100%
Meet Masako
Friendship with Masako increases to 100%
get a Magnum
get a M40
get a FAMAS
get a chain saw
get a bait
get explosive
drink coffee 50 times
drink coffee 100 times
drink coffee 150 times