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