Very important note: SAVE. And don't save when the game is suddenly frozen, just quit (yes, you'll lose some progress, but it's better than losing all because if you'll save frozen game, you'll be stuck with it).

So, short review: It's a really good interactive film. 8 endings, and video content based on your choices (answers). You play as a watcher, and In between of short clips you can explore the house and read diaries, books, and some documents. "Sexual content" not only in video but in texts as well. In my opinion, if you are not in a hurry and enjoy reading you'll feel the game better (well, as always)