Avalon Hill had originally promised a new rulebook streamlining procedures, eliminating redundancies, and possibly revising the "To Hit/To Kill" system used to simulate armor protection and penetration in tank combat. Instead, by the time it debuted, "Advanced Squad Leader" had become a complete replacement of the games of the original SL series. As an example, the original SL has only twelve different tank and assault gun types, and only five different armor ratings, from -2 to +2. By contrast, ASL has separate counters for 56 different types of tanks and assault guns for the Germans alone, with armor values from 0 to 26, based on actual thickness and degree of slope. Beyond Valor includes 99 separate German vehicles simulated in the game, including halftracks, armored cars, anti-aircraft vehicles, and soft skins.