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