Here is a full playlist of all the puzzles in the game :)
Note: There are story puzzles as well so you will get more than 20 puzzles in your playthrough (I unlocked it in marakhat after the first puzzle although there were 2 others marked on the map)
https://www.youtube.com/playlist?list=PL90YOFBe2p0xiTcYcHYcX...Bleep Bloop!
EDIT: If needed, I will list them up seperately in the solution