There is much delicious sarcasm and humor in this game. Buy it now.
too short; was expecting to read more version follows:
This is science fiction at its best, but also great dramatic writing, and a well planned and executed adventure game at the most basic level. No, it's not perfect.
The game studios that spend a fortune trying to be "cinematic" by filling a game cut scenes full of explosions, QTEs, and embarrassed A list actors should play Culpa Innata. This is a game consisting of three things: point and click adventure game exploring, interesting but not-too-difficult puzzles, and lots and lots of conversations. And it works beautifully. The game gently but inexorably pulls you forward into the next part of the plot, with just enough "game" to keep you involved and gentle hints presented in your diary and from friends in ways that don't feel like hints. The shocker is that the conversations are the best part.
I have never been so engaged in a video game conversation. Great writing (humor! sarcasm!), strong acting, well chosen camera angles and facial expressions that (while a bit mechanical if you think too much about it) artfully telegraph believable hints, the list of things done right in the conversation scenes is getting tedious isn't it? I am occasionally reminded I am in a game, but I frequently forget as well. It's not perfect, but it works.
The engine isn't perfect, but you forget that. Textures sometimes remind me of games 10 years older, the camera angles are well done but sometimes a bit jarring. The conversations have a slightly odd timing that sometimes reminds you you're playing a game, and twice I would have been stuck on puzzles without a little help from the internet. None of these things seriously get in the way of the game or my enjoyment of it, though.
The game world is a Utopia; all utopia stories are really dystopia stories. This one is presented neutrally, though, and you are left to draw your own conclusions about a successful society based on an entirely selfish ideal. This creates a new context for the conversations you will be having, which are at the same time very normal and strangely alien. Sometimes I think everyone I am interviewing is lying to me. Sometimes I think everyone in this society is faking it. Sometimes I ask the right question and get an immense sense of satisfaction.
Towards the end, you sometimes get railroaded along the plot without many options. Also, if you miss one of the "things to do", you can end up killing time in the days because of that mechanic that only lets you waste so much of a person's time per day. You can't get stuck, but you can lose, and man is it annoying to see that smug little jerk beat you to the punch after 28 hours of investigation! :)
Finally, the music is great. It injects moods into different scenes. It ranges from "this is good video game background music" to "must learn the name of this downtempo track so I can buy it". I haven't yet been tempted to turn off the music and play out-of-game tunes yet.
Absolutely recommended with no reservations. Many thanks to some random person in the forums whose name I have forgotten that recommended this and led to its purchase.