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