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