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Fifth Door

Hiring

Fifth Door is a YC Fall 2025 (F25) company. Based in San Francisco, CA, USA. Team of 3.

  • Consumer
  • Gaming
  • AI

About Fifth Door

GPAgent's own fund-neutral profile, written from public information. Updated Oct 5, 2026.

Summary

Fifth Door lets anyone build, share, and play games using AI, without requiring design or coding skills. The platform targets everyday users who want to turn creative ideas into playable games and share them with friends. It replaces the traditional barrier of needing a development team or technical expertise to bring a game concept to life.

From the Y Combinator listing

How Fifth Door describes itself in Y Combinator's public directory. Original listing (opens in a new tab)

Create and play games with AI

Fifth Door unlocks the power of imagination by making it easy for everyone to create, share, and play games anywhere, with anyone. We exist to stimulate the creativity, connection, and joy that people get when they play games.

Facts

Industry
Consumer / Consumer -> Gaming
Location
San Francisco, CA, USA
Team size
3
Status
Active
Stage
Early

Founders (2)

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