Here is the full list of all 25 Unpacking achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
Flushed every toilet.
Turned on a game console.
Unpacked 2018.
Built a tower out of baby blocks.
Rescued a forgotten poster.
Tidied up his underwear drawer.
Placed all the coffee-making equipment on the counter.
Found a head to wear the hat.
Put an electronic item somewhere dangerous.
Put the cookie jar out of reach.
Made the mannequin dab.
Turned on a music player.
Solved the cube.
Unpacked 2015.
Found a place for every plant.
Put the tiger and pig side by side.
Unpacked 2013.
Wrote an equation with fridge magnets.
Set the time on the microwave.
Unpacked 2012.
Unpacked 2010.
Unpacked 2007.
Unpacked 2004.
Unpacked 1997.
Found your camera.