Here is the full list of all 25 Unpacking achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
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.
Unpacked 2013.
Set the time on the microwave.
Wrote an equation with fridge magnets.
Unpacked 2012.
Unpacked 2010.
Unpacked 2007.
Made the mannequin dab.
Unpacked 2004.
Put an electronic item somewhere dangerous.
Unpacked 1997.
Turned on a music player.
Found your camera.
Solved the cube.
Put the cookie jar out of reach.
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.
Rescued a forgotten poster.
Flushed every toilet.