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