The third and final game in the Street Fighter Alpha series, released in between even more Street Fighter games from other series, adds a variety of new characters to the previous games' roster while further developing its fighting systems. Alpha 3 centers on the addition of "Isms," a set of three selectable fighting styles that mimic various other games in the series (A-ism is similar to the previous Alpha games, X-ism works similarly to the combo system of Super Street Fighter II Turbo and V-ism is a variable style focused on custom combos). It also introduces the Guard Power Gauge, which depletes every time you block an attack, ultimately leaving you vulnerable to a Guard Crush (both your Ism stance and character choice influence the size of your Guard Power Gauge). Along with numerous other updates, these changes make Alpha 3 a significantly different beast from previous entries in the series.