Here is the full list of all 101 Little hidden city achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
the end of the game
find camera
find wheelchair
find medical bed
find cat
find tractor
find basketball
find inflatable pool
find solar_battery
find bicycle
find electric car
find flower_palicious
find satellite_talk
find power station
find pointer
find slide
find sculpture_rock
find gazebo
find telescope
find water_motocycle
find motorcycle
find air conditioning
find football_ball
find swing
find boat_old
find TV
find traffic light
find VOLGA
find statue
complete a level gas station
find part of the train
find haystack
find army trailer
find engine
find strut
find wheel_2
find barrel
find wheel
find spare part
find Jack
find equipment for garage
find canister
find canister_2
find extinguisher
find old car
find soona
find logs
find muffler
find hovel
pass_level_supermarket
find stool
find carton
find watermelon
find sink
find trolley
find moped
find handbag_female
find bananas
find drawer
find eggplants
find bank_register
find pac_products
find shoe
find fish
find steak_sibs
find basket
find jacket
find soft toy
find bucket_washing brush
find cake_shocolate
pass_level_country house
find watering can
find log
find Boots
find plant_in_roof
find tools
find bucket of apples
find stairs
find light
find potty
find watering can_2
pass_level_busstation
find stroller
find nameplate
find newspaper
find suitcase_opened
find bicycle_old
find shoes
find suitcase_02
find bottles
pass_level_apartment
find tube
find umbrella
find strap
find book
find hat
find suitcase
find coat
find magnifying_glass
find bag
start the game