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