Rules by Topic

Site note: Topic categories, explanation selections and ordering are editorial navigation aids, not official game classifications. Official text uses wording from the game files.

How to read this page (site notes)

Expand Key official explanations to read the official help text. Follow terms or lessons to the dictionary for original text and sources of expanded references.

Boxed expressions are unresolved. Dotted-underlined values expand fixed constants using game formatting. Conditional text shows candidates and expressions; game state is not evaluated and missing text is not inferred.

Entries spanning several topics are assigned to one here. Follow links in the text to related terms in other topics.