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