ooh this again :) I've missed playing it, I have to say I barely got through braid and didn't even finish it :D it was great but I ended up watching the secrets and spoiled my game, then I pretty much started watching the game and stopped playing it.
The witness I didn't even play, just checked out the most important moments, like the full complete ending, some "lore" elements and basically spoiled the ending again :D I have to say I loved the concepts that I saw at least.
It reminds me of The Talos Principle, which I also left unfinished, I got as far as getting the half of it complete, then I opened the warehouse went "up top" and saw I had many more puzzles to go :D
Now that I think about it there were two other games that come to mind, one was a indie game Mind: Path to Thalamus. I actually managed to finish it, it oooooh damn, well it's a great game, but damn I just remembered the most mind numbing strange puzzle game I've ever played Antichamber :D and gameplay wise The Witness kind of reminds me of how much fun I had playing A Story About my Uncle, I will leave two trailers of Antichamber and ASAMU
Mind warping Antichamber!
Something about an adventure :)
So if you've missed any of those games I would highly recommend them :)