Here is the full list of all 14 INSIDE achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
Take a deep breath
Pull together
Dislodging derelict in the depths
Safe falling and hard landings
Something’s not right down here
Unearthing secrets
They never made it to market
Lies beneath the city
Skipping stones at the beach
Dive back in
Shadows at noon
Hanging up
Do an elevator pitch
It comes together