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