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