Fallout Tactics combat is more complicated than combat in Fallout and Fallout 2. The basic combat mechanics are similar, but there are some serious differences. Fallout Tactics features three modes of combat: Continuous Turn-Based (CTB), Individual Turn-Based (ITB), and Squad Turn-Based (STB). In CTB, everyone can act at the same time, and Action Points are regenerated at a rate based on Agility. ITB is the system used in the original games. STB is a variation of that; each turn is given to a squad. Other changes include the ability to change stance, modifiers for height, and setting sentry modes, which let characters shoot automatically in CTB upon encountering an enemy.