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