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