Solo Play

BANG! is designed for a group; no official solo mode was found.

No official solo mode

The current publisher rules specify four to seven players. They do not include a solo mode. BGG lists a discontinued two-player variant, but the publisher says it is no longer supported and points players to the separate two-player game, BANG! The Duel. That is a separate title, not a solo mode or an expansion of this guide. Publisher-confirmed note.