Wonderfall, the narrative adventure in which a version of 1920s Paris slowly dissolves into sand, finally has a release date. Paris-based independent studio Attaboy Interactive says the game launches on Steam on Wednesday, December 9, 2026, and it marked the news with a new trailer that, for the first time, lets the cast speak. That leaves a little over five weeks until launch, and the free demo that toured Steam Next Fest, Gamescom and Tokyo Game Show is still available on the store page for anyone who wants to try it first.
A city being eaten by Entropy
The premise is unusual. In Wonderfall, a force people have taken to calling Entropy is consuming Paris: monuments, streets and people are crumbling into sand, while strange metallic gardens crystallise around the oldest landmarks. Nobody understands why. You play Léon, a young orphan who has only ever known a half-buried Paris and who, crucially, is the one person able to shape the sand that is swallowing it.
The story starts with an errand. Léon's foster father, Ernest, sends him into the ruins of the Île de la Cité with a single job: get inside Notre-Dame and bring back a mysterious stone. Between Léon and the cathedral lie collapsing métro tunnels, the island's rooftops, the Sainte-Chapelle, the guards of an organisation called the Académie and galleries nobody has walked through in centuries.
Attaboy says it rebuilt the Île de la Cité landmark by landmark before letting Entropy loose on it. Anyone who knows Paris should recognise the geography, the studio says, while those who know it well will spot where it took liberties. The art direction leans on soft, low-poly shapes and washes of violet and pink, which gives even the ruined streets a strange, dreamy calm.
Sand powers, stealth and puzzles
Wonderfall is not a combat game. It is built around exploration, traversal, a little stealth and environmental puzzles, with Léon's sand abilities at the centre of all of it. He can reshape parts of the world to open new routes, slip past the corrupted creatures that roam the ruins and carve a path through areas that would otherwise be impassable. The studio describes its traversal and puzzle sequences as inspired by classic third-person adventure games.
Most of the storytelling happens while you move, rather than in long cutscenes. Dialogue plays out on the way to the next rooftop, written logs are scattered across the city, and Attaboy says it has saved its handful of cinematics for the moments that need them. The idea is that the city reveals what happened to it as you explore, and that you may not get every answer by the end.
The rooftops get special attention. In an earlier development diary the studio explained that the roofs become the safest way through a city whose streets can no longer be trusted. The sequence is only around a quarter of an hour of the game, but it is one the team clearly cares about, down to the grey zinc that has topped Parisian buildings since the early 19th century.
The cast finally has a voice
The headline addition in the new trailer is voice acting. Wonderfall has more than a thousand lines of dialogue, and Attaboy has now named the actors behind its four main characters.
Léon is voiced by Ryan Highley, whose previous work includes Road 96 and Haven. Lily, the guarded young woman who opens the game on the Île de la Cité on the day the ground gives way, is played by Jeanne Pajon. Paul Bandey, known for Heavy Rain and Styx: Master of Shadows, plays Ernest, a self-taught engineer from the Montmartre quarries who is now ill and hiding on a barge on the Seine.
The fourth main role is Wotan, full name Wilhelm Otto Tanner, who lost his mother to Entropy as a child and has spent his life trying to master it. Attaboy describes his performance as calm, certain and never raised, which is precisely what is meant to make him unsettling.
Length, languages and what to expect on December 9
Attaboy now pegs Wonderfall at roughly eight to ten hours and says it is designed to be finished rather than stretched out. Voice-over is in English only, while the interface and subtitles are available in English, French, Italian, German, Spanish, Russian and Simplified Chinese.
The game is currently listed for Windows PC on Steam. No console versions have been announced, and the studio has not yet published a price. It has, however, made a point of asking players who were waiting for a firm date before adding it to their wishlists to do so now, saying that wishlists help a small team like it more than people might think.
Wonderfall has had a busy year on the show circuit. After its Steam Next Fest demo, it appeared at Gamescom and was picked for Tokyo Game Show's Selected Indie 80 programme, which this year chose 80 games from more than 1,500 applicants. December 9 is when everyone else gets to see whether Léon makes it to Notre-Dame.
