73%Strong matchDude, Stop
88%2k88% positive reviews, Very Positive across 2k reviews·Puzzle · Funny
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Play a video game while it is being created and follow the adventures of its developer throughout the game's development process. The developer narrates. The world evolves. It's not a bug, it's a feature.
Hello World: a developer story
Steam
He's building it. You're playing it. Pixel's just trying to survive!
Welcome to Hello World, a unique Narrative Physical Adventure where the lines between player, character, and creator hilariously blur. Step into a world that begins as a blank canvas and evolves before your very eyes, all under the often chaotic, always witty, live narration of 'The Dev' – your guide, your biggest obstacle, and the mastermind behind your adventures!
In Hello World, you control Pixel, a humble dark square with expressive white eyes. Navigate through levels constructed in real-time by The Dev, mastering foundational platforming and directly interacting with the unique physical elements of the environment. Push, pull, stack, and manipulate in-game objects as The Dev introduces them, using your wits and Pixel's emerging abilities to solve challenges.
Enjoy a constantly evolving experience as your very actions seem to inspire (or confound!) your game's creator. You'll need to adapt quickly as The Dev introduces new game mechanics and physical objects on the fly, sometimes with unexpected and amusing results.

*and also my mom
“( O_O ) ... ( ? ) ... ( ! )” — Pixel ★★★★★
"A profound exploration of the iterative design process, or just a developer forgetting to turn off his microphone? Yes." — Placeholder Gamer Magazine (9.5/10)
"My son made this! The little jumping cube is so cute. I don’t understand why he keeps falling, but it looks very professional." — The Dev's Mom
“azertyuiopqsdfghjklmù wxcvbn,” — Azerty (Voted "Warmest Keyboard of the Year")


Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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