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