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