Corpus Simsi is a singular object, mixing poetic text and images created from the video game The Sims™. A novel that has integrated a particular technological tool during its realization, and is grafted on a precise virtual imaginary. Corpus Simsi is based on a playful variation on the notion of autofiction. Chloé Delaume, a fictional character worse than the others, refused to incarnate herself in a book. In a previous novel, La Vanité des Somnambules, she left the initial place of residence of her fellow creatures, Somnambulia, to take possession of a human body, which she hastened to parasitize. Having been expelled while pushing the hosting body to implosion, she finds herself nowhere, which is not very practical. So she decides to take up permanent residence in The Sims™ game, knowing that this new territory is particularly suited to her situation as a homeless fictional character. In the form of an avatar of her former human body, she becomes a small formatted video game character, subject to rules different from those of the real world, in front of which fiction is perhaps not as sovereign as it seems. Pre-programmed actions and fatum, bugs and clinamens, loops and ritornellos: so many similarities between the two universes, so many loopholes to fall through.