Recs.
Updated
The Talos Principle is a first-person puzzle game in the tradition of philosophical science fiction. Made by Croteam, the creators of Serious Sam, and written by Tom Jubert (FTL, The Swapper) and Jonas Kyratzes (The Sea Will Claim Everything).
SpecsUpdate
Pros
Pro Great storyline
The puzzles in the game are great, but they're tied together with a thought provoking story line filled with mystery and intrigue. A story about a robot with human consciousness who is being guided by a disembodied voice, are they to be trusted? As the story progresses the player is drip fed clues which can lead them closer to the truth.
Cons
Con Ending troubles
After getting the "normal" ending you will have to replay the entire game again if you want to find everything you missed. Replaying a puzzle game isn't that fun when you already know the puzzles.