Here is the full list of all 23 Lightmatter achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Saving humanity.
Take good care of that lamp!
Didn't you sign the NDA?
Be careful with those photon connectors!
Sometimes it's good to vent a bit.
Hey, don't kick that!
Faster than light.
1095.3 burgers were consumed during this production.
Someone seems to be addicted.
Hey, Who Turned Out The Lights?
You can have your cake AND eat it!
Do you need a break?
I like cats.
Where are you going?
Remember to sign it once you get out.
You pushed the button too hard.
You saw it through to the very end.
Quantum superposition at the push of a button.
I heard that tool is quite a hit.
Big Brother is watching you.
You crossed paths with that four-legged fluff ball.
Thank you.
The human body can survive 21 days without food.