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