2009 · ソースブック（プレイを拡張するルール／オプション）

GURPS Mass Combat

An abstract mass-battle system for resolving land, sea, and air engagements at any technological level, from fantasy invasions and historical warfare to futuristic conflicts. Rules cover logistics, movement, reconnaissance, air superiority, amphibious assaults, airborne operations, sieges, and other military concerns. Battles are resolved round by round, with commanders choosing strategies and seeing the results of their decisions. The system also handles pursuit, casualties, looting, and recovery after combat, while keeping player characters involved in the action. Guidelines support units of varying quality, training, equipment, and technology, with ready-to-use statistics and reference tables for play.