Think or Shrink Game Show

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  Parkour

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  Tutorials

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  Game Master

Inspiration

Think or Shrink was inspired by fast-paced trivia game shows where tension rises with every question — but with a Horizon Worlds twist. We wanted to create a fun, competitive experience where being wrong doesn’t just cost you points… it costs you your height. The shrinking mechanic, the chaotic parkour, and the social strategy of voting all came together to build a game that feels fresh, silly, and high-stakes at the same time.

What it does

Think or Shrink is a multiplayer trivia game show where players answer questions, survive rounds, and vote each other out. • Players sign up, compete through multiple rounds, and answer timed trivia questions. • After each round, everyone votes for the player they want eliminated. • The most-voted player shrinks to pocket size and must complete a tiny parkour course to return to normal height and watch the rest of the match. • Hosts have full control over questions, rounds, and eliminations using a custom UI panel. It’s strategy, social pressure, and comedy — all in one experience.

How we built it

We built Think or Shrink entirely using Meta Horizon Worlds tools, including: • Avatar scaling for shrinking and regrowth • Custom UI for host controls, rounds, voting, and question management • AI NPC Game Master for explaining rules and guiding new players • Code blocks & TypeScript to handle the game logic, round flow, and player tracking • World building tools for environments, tutorials, and the Pocket Parkour course Everything was designed to be smooth, intuitive, and fun for both players and hosts.

Challenges we ran into

• Creating a smooth and bug-free shrinking mechanic without breaking player movement • Building a clean host UI that’s easy for anyone to operate • Ensuring voting, elimination, and player scaling always sync correctly • Balancing the difficulty of the Pocket Parkour so it’s fun but not frustrating • Making tutorials simple enough for first-time players to understand instantly

Accomplishments that we're proud of

• A fully working trivia show with rounds, voting, and eliminations • A unique shrink mechanic that adds humor and chaos to every match • A host experience that feels like running a real game show • A polished tutorial zone that makes the game easy for anyone to jump into • Smooth integration of AI NPC guidance through the Game Master

What we learned

• How to combine UI, avatar scaling, and gameplay logic into one seamless system • How to balance competitive mechanics in a social VR environment • How to design environments that guide players naturally without extra instructions • How powerful Horizon Worlds’ scripting tools can be when building interactive game shows

What's next for Think or Shrink

• Adding themed rounds and category-based trivia • Introducing special power-ups for players (double votes, immunity, etc.) • Adding sound effects and animated reactions for shrinking moments • Expanding the parkour paths and making them randomized • Adding a scoreboard and seasonal leaderboards • Enhancing the Game Master with more voice lines and AI-driven interactions

Built With

• avatarscaling
• customui
• horizonassetlibrary
• horizoncodeblocks
• horizonphysicssystem
• horizonsyncframework
• horizontypescript
• horizonworldbuilder
• metahorizonworlds