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