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