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