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