ONCEVAL PRESS KIT
https://onceval.com/press · hello@onceval.com

ONE LINE
Onceval turns a few sentences to ChatGPT or Claude into a little 3D world with a story you can play and share.

SHORT (50 WORDS)
Onceval makes small playable worlds from a description. Tell ChatGPT or Claude about a place and something that happened there; Onceval builds the island, its lights, secrets and lost souls, checks the story can be finished, and gives you a link anyone can play in a browser.

LONG (120 WORDS)
Onceval makes small playable worlds from a description. You describe a place and something that happened there to your AI assistant, ChatGPT or Claude. The assistant writes an island and a story; Onceval compiles them into a 3D island with buildings, lights, secrets and lost souls, checks that the story can be played to its end, and shows it beside the chat. Change your mind and ask for a ruined chapel or a moved lighthouse: the island is rebuilt. Anyone can play the finished tale in a web browser, without an account. Onceval calls no AI model of its own: the assistant writes, Onceval builds, checks, stores and renders. It launched in October 2026 with a Halloween tale, Samhain on Eilean Dubh.

FACTS
Name: Onceval
Tagline: Create little worlds. Tell stories. Step inside.
Made by: Mik Bry, MDB (MARABOT) SAS, France
Launched: October 2026, Halloween Special Edition
Create with: ChatGPT or Claude, by connecting Onceval (an MCP connector)
Play on: a web browser with WebGPU (current Chrome, Edge or Safari); no account needed to play
Price: free to play; creating: a free plan to start, and the Halloween pack, EUR 4.99 once (VAT included)
Featured tale: Samhain on Eilean Dubh - https://onceval.com/play/samhain/
Website: https://onceval.com

FOLLOW
YouTube    https://www.youtube.com/@playonceval
TikTok     https://www.tiktok.com/@playonceval
Instagram  https://www.instagram.com/playonceval
X          https://x.com/playonceval
Bluesky    https://bsky.app/profile/did:plc:fvenukred6dnrp33jaqusvaq (@onceval.com)

FOLDERS
social/  avatar (1024 PNG, 800 and 400 JPG), YouTube banner 2560x1440, X header 1500x500, Bluesky banner 3000x1000
art/     key art with title, storybook art, share card, screenshots, Halloween pack shots
brand/   the magician mark and the Samhain souls (SVG)
video/   trailer posters; the two trailers themselves (full HD, with sound):
         https://onceval.com/media/onceval-trailer-1080p.mp4 (16:9, 1:13)
         https://onceval.com/media/onceval-trailer-vertical-1080p.mp4 (9:16, 0:36)
         and a real session recorded in ChatGPT on 22 October 2026:
         https://onceval.com/media/onceval-chatgpt-demo.mp4 (2:13, captioned)
         https://onceval.com/media/onceval-chatgpt-create-and-play.gif (0:52 loop)

BRAND
Colours: Night #0B1219 · Lime wash #F4EAD5 · Lantern gold #E9BC77 · Magician purple #4B3073
Type: Fraunces (titles, the name), Figtree (text); both SIL Open Font License, on Google Fonts
The name: Onceval, one word, capital O. The four-point star may stand before it.

USE
You may use these files to write about Onceval, review it, or share it. Please don't change the art or the mark, and credit "Onceval" when you show them. Anything else: hello@onceval.com
