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