I finished the game and reached all 3 endings, but there are still quite a lot achievements, which I haven't got (in order of "i have no idea how to get it"):
LOL (Laugh at the pointlessness of existence). What the hell is it?)) Can I laugh at this game?
Split Personality (Communicate with your double). I touched my record and the Shepard too.
Hedging My Bets (Do as you're told (for now)). I did how I was told quite a few times, following Elohim's order to collect sigils, to go on the light, to turn back from the stairs - all these doesn't help.
Know Your Limits (Accept Elohim's wisdom). Again, I turned back and went to the lighting door, accepting what Elohim told me, but didn't got this achievement.
Press The Serpent (Expose the flaws in the code). I know that I can reach the code by pressing F1, and I even changed a value of one variable, this didn't help me.
How to get them?
Please use spoiler tags.