I Enjoyed the first two, Very stimulating, brain wracking and sometimes tough as nails test, some parts I did have to look at a walkthrough because of how...vauge some were, But the first one was very organic, It introduced itself very well.
I adored the second one, The plotline was immense, the puzzles were tough and I will admit I didn't like some (I.E. The computer bonding cards one) But it was immersive enough to keep wits about.
Unfortunately rebirth was stale, Some puzzles seem to be more time killers than actual puzzles, wait for this platform to go here is a tiring game mechanic, also this one somehow feels too similar to portal rather than think of survial like the other two felt.
I love the series, its just the first two popped so well. the last one is losing its luster because it just feels so much more...controlled than the other two.
Still recommened for the first two. 4 outta 5