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.