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.
Built a tower out of baby blocks.
Set the time on the microwave.
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.
Turned on a game console.
Put the cookie jar out of reach.
Put an electronic item somewhere dangerous.
Unpacked 2018.
Wrote an equation with fridge magnets.
Put the tiger and pig side by side.
Unpacked 2015.
Found a place for every plant.
Unpacked 2013.
Unpacked 2012.
Unpacked 2010.
Unpacked 2007.
Unpacked 2004.
Made the mannequin dab.
Unpacked 1997.
Turned on a music player.
Found your camera.
Solved the cube.