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 2007.
Put an electronic item somewhere dangerous.
Solved the cube.
Unpacked 2004.
Made the mannequin dab.
Unpacked 1997.
Found your camera.
Turned on a music player.
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.
Unpacked 2010.
Rescued a forgotten poster.
Unpacked 2012.
Set the time on the microwave.
Wrote an equation with fridge magnets.
Unpacked 2013.
Found a place for every plant.
Unpacked 2015.
Built a tower out of baby blocks.
Put the tiger and pig side by side.
Flushed every toilet.
Unpacked 2018.