Bellicoso is a multi-party conflict resolution simulation based loosely on the bitter civil war in El Salvador. It is designed to explore issues in: 1) the management of interactions between external negotiations between sides and internal negotiations within them, 2) the tensions that get created when parties can resort to various forms of "violence" in order to "change the game," 3) the ways that third party intervenors can "gain entry" into a conflict in order to mediate it, and 4) the use of staged agreements to build momentum toward settlement. Negotiations take place between a government team and an opposition team, each consisting of four players, and are facilitated by a UN mediator, a total of nine distinct roles.