If you enjoy the Portal series you will almost certainly enjoy this although it supplants the subtle humor of Portal with an introspective exploration of what makes us human.
It is set long after the extinction of humanity but the records of our society still exist. As such, we get to hear the thoughts and read the writings of human beings aware of their own impending extinction as well as explorations of philosophical writings on humanity and morality from writers of antiquity.
A somber, thought-provoking game.
It also includes the DLC "The Road To Gehenna" which explores questions of an afterlife just as introspectively.
A profoundly great experience.

Love the combination of puzzles and philosophy. Part 2 is even better

These puzzles are fun, although there were a few where i did need to rethink what i was doing or get some help, i think i may of found one or two that i completed using an alternitive unintended way lol.