In the original "Tekken", players could only block attacks manually. From then on, starting with "Tekken 2", characters automatically block while not moving forward or performing actions, a feature called "neutral guard." Standing or retreating characters will block high and middle attacks with no input from the player, while crouching characters will duck high attacks and block low ones. Normal middle attacks will hit crouching players, but some special mid-attacks can be blocked by both stand and crouching neutral guards. Meanwhile, pressing backwards will give the player an "active guard" that can withstand certain combo attacks that would normally penetrate the neutral guard. Some characters are equipped with parries and reversals that act like traditional "press button to block" systems.