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