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OpenTTD

An open source simulation game based on Transport Tycoon Deluxe.

Unfriendly. Doesn’t accept AI-generated work.

Homepage Repository

Issues and pull requests generated by LLMs are not accepted, and using AI to generate entire lines of code is unacceptable. AI may proofread issue and comment text but not write it.

Policy by area

Code contributionsPatches, pull requests and other changes written with AI tools.
Unfriendly
  • Only minor help (autocomplete, grammar)
Issues & bug reportsBug reports, security reports and issues found or written with AI tools.
Unfriendly
  • Only minor help (autocomplete, grammar)
AI-written textPull request descriptions, issue comments and summaries written by AI.
Unfriendly
  • Only minor help (autocomplete, grammar)

In their own words

Code contributions

Please refrain from submitting issues or pull requests that have been generated by an LLM or other fully-automated tools.

Contributing to OpenTTD

Using an AI tool to generate entire lines of code is unacceptable.

Contributing to OpenTTD

Issues & bug reports

Using an AI tool to _proofread_ your issue/comment text is acceptable. Using an AI tool to _write_ your issue/comment text is not.

Contributing to OpenTTD

AI-written text

Using an AI tool to _proofread_ your issue/comment text is acceptable.

Contributing to OpenTTD

Sources