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