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