# OpenTTD: Not AI-friendly

> 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.

- What it is: An open source simulation game based on Transport Tycoon Deluxe. (Application)
- Homepage: https://www.openttd.org/
- Repository: https://github.com/OpenTTD/OpenTTD
- Overall stance: Not AI-friendly (Unfriendly). AI-generated contributions are not accepted; at most minor help such as autocomplete or grammar fixes.
- Last classified: 2026-10-09 (manual review, high confidence)
- Policy last changed: 2026-10-09
- Web page: https://areweaifriendly.com/projects/openttd/

## Policy by area

- **Code contributions**: Not AI-friendly (Only minor help (autocomplete, grammar))
- **Issues & bug reports**: Not AI-friendly (Only minor help (autocomplete, grammar))
- **AI-written text**: Not AI-friendly (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." (https://github.com/OpenTTD/OpenTTD/blob/master/CONTRIBUTING.md)
- Code contributions: "Using an AI tool to generate entire lines of code is unacceptable." (https://github.com/OpenTTD/OpenTTD/blob/master/CONTRIBUTING.md)
- 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." (https://github.com/OpenTTD/OpenTTD/blob/master/CONTRIBUTING.md)
- AI-written text: "Using an AI tool to _proofread_ your issue/comment text is acceptable." (https://github.com/OpenTTD/OpenTTD/blob/master/CONTRIBUTING.md)

## Sources

- [Contributing to OpenTTD](https://github.com/OpenTTD/OpenTTD/blob/master/CONTRIBUTING.md), fetched 2026-10-09