There are several FAQ categories available:
- FAQ general questions - General questions
- Installation FAQ - Questions regarding installation, system requirements, etc.
- FAQ OpenTTD versions - Explains the terminology used for various versions of OpenTTD
- FAQ gameplay - Regular gameplay questions
- FAQ multiplayer - Questions regarding multiplayer games, setting up server, etc.
- NewGRF FAQ - Questions regarding replacement graphics, new vehicle functionality, etc., via .GRF files.
- FAQ 32 bit graphics - Questions regarding 32 bit graphics.
- FAQ troubleshooting - Questions regarding gameplay crashes, problems, etc.
- FAQ development - Questions regarding development of OpenTTD, e.g. downloading the source, setting up compilers, etc.