The Talos Principle

Sometimes if you spend too long in a puzzle, Elohim will say something like you don’t have to finish this now, you can leave and try other puzzles and come back to this one later.

When this happens, simply leave the puzzle you are in, and the achievement will pop.

I've now unlocked this on 4 accounts without any issue.
2 of the accounts were gold, the other 2 silver.

The principle of this achievement is:
- you enter a level.
- you've been in there for 10 minutes without having got the sigil part.
- you get a friendly chat from Elohim.
- you give up without taking the sigil part, and walk back out of the level.

I've unlocked this using world A map 1 at the very beginning of the game.
Once you get in the yeard with the locked gate, enter the right hand level.
This is the "Peephole" puzzle.

For 2 accounts, I stayed standing still at the window, using a wired controller.
For the others, I was moving around.

For all, I started a stopwatch when I entered the "level",
and Elohim talked at 10 minutes on the dot, every time.

I have no idea why others are saying you cannot expect to unlock this achievement if you just wait doing nothing. It works without problem.

As a note, it works exactly the same way on the windows version of the game.

I recommend going for this in Building C - level 7 in the puzzle "Prison Break" (the puzzle is straight ahead as you teleport into C7).

For this achievement, the description is quite ambiguous but the requirements are to spend an unspecified amount of time solving a puzzle without actually collecting the sigil until after Elohim reaches out to you. For me in this puzzle, I had to wait over 17 minutes before Elohim finally spoke to me. I do not know how many dialogue options there are and what triggers one over another but for me on this level, he said: If the answer does not come to you, do not despair. The worlds of my garden are many. After those words of encouragement, I went ahead and left the puzzle and as soon as I passed through the purple gate, the achievement popped!

*It is important to know that you cannot be standing still and expect to get the achievement - I assume that the game wants you to be actively trying to solve the puzzle, but I pointed myself into a corner and rubberbanded my controller so as to be "running" into the wall. If you're playing in first person mode, I would recommend going into the Game Options and changing your preferred view to over your left or right shoulder or to behind player so that you can actually see yourself moving (in first person, it looks as though you're standing still, even though you aren't!)

Should you chose to solve the puzzle and grab the sigil at this time rather than leave, you can instead unlock: