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