Here is the full list of all 34 LUNARK achievements.
Congratulations! You finished the game!
You've read all of the villain's diaries.
You maxed out your gun specifications.
You petted all the doggos!
That was a hard place to reach.
You brought hope to a nice couple.
The Zirneklis Queen is now definitely dead.
You found secret location #11!
You found secret location #10!
You solved the puzzle and got a map.
Bring Hugg 3 $hells and you’ll get a heart!
You found secret location #9!
You destroyed the Swordroid gang.
You found secret location #7!
Nothing’s more relaxing than a gentle purr.
You found and helped Smockey!
You upgraded your weapon!
Fall from two levels above without grabbing anything and you won't be getting up.
You recovered a strange artifact.
You defeated the Zirneklis Queen (basically a giant spider).
You've literally hit a wall.
You found secret location #3!
You found secret location #1!
No droids were harmed during this tutorial.
You found secret location #2!
You found secret location #4!
You found secret location #5!
You found secret location #6!
You found secret location #8!
None of the guards spotted you.
The king of basketball! All you need now is… a ball.
It took some time, but in the end you're a great dancer!
You maxed out your number of hearts.
Impressive! You accomplished everything in LUNARK!