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