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