Help for NightReign and the xBookvideo app. Most questions are answered below — if not, email us and a human will reply.
Contact us
Send us an email and we'll get back within 2 business days.
NightReign is a single-player action roguelite. Move with the on-screen stick, attack with the buttons, and clear a run before dawn. There is no account, no internet connection required, and no in-app purchase.
Progress is stored only on your device. Deleting the app removes saved runs and we cannot recover them remotely, since we never receive a copy of your data.
Nothing. No analytics, no ads, no trackers, no account system, no network requests — everything runs on your device. See our privacy policy for the full statement.
NightReign was produced as part of a public-domain IP project. The in-game “How This Was Made” panel links to a 27-episode video series of the source novel, made with the xBookvideo pipeline. You can browse it at films.xbookvideo.com.
NightReign is built for iPhone and runs on iPad in compatibility mode. A native iPad layout is planned for a future update.
Open app.xbookvideo.com, upload a public-domain or self-owned book (EPUB or TXT), then let the pipeline write the narration, generate the visuals and render the vertical video with subtitles. Renders typically take a few minutes per chapter.
Any book you own the rights to, plus public-domain works. We ship a catalogue of over 1,500 public-domain texts from Standard Ebooks you can start with right away.
Try the file again — very large or unusually formatted books sometimes need a second pass. If it keeps failing, email us with the book title and file type and we'll look into it.
Subscriptions and purchases are handled by our payment provider. Email [email protected] with your receipt and we'll sort it out.