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