Explore a dark, ruined megacity, scavenge supplies, craft tools, establish camps and rebuild a lost civilization. Complete procedural science-fiction incremental adventure by Noora Routasuo with original GPT city scenes that follow exploration and camp state, readable contrast and device-local saves. Desktop recommended. Source: https://github.com/nroutasuo/level13 (Apache-2.0; 266 stars observed; source updated October 18, 2026). Metadata tags: github-source, game.

level-thirteen-city-below.skillsafe.ai

Run app here

PricingCompletely free

Security scanClean — skill and frontend scanned

Source nroutasuo/level13

Created2026-11-04

Updated2026-11-04

Every public app is built from a security-scanned skill and must pass a clean scan — skill and frontend — before it can be listed. Have a skill of your own? Turn it into an app — or read the step-by-step walkthrough.