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