Bound, later known as Ground Bound is a "new" feature that was introduced in Tekken 6. While the distinct properties of the Bound system were new to Tekken, it was based on an already existing system of juggle finishers present in Tekken 5, where some juggle finishers would literally "slam" the opponent into the ground, meaning they could not tech roll.
In some reported cases, it has been said that an opponent has been bound more than once, though they have yet to be verified, and the circumstances are not yet investigated. It is likely that these instances have been misunderstood by viewers where a player has "picked up" their opponent in the early frames of getting up, giving the appearance of a single juggle, when in fact, it is two separate juggles (which also means the bound counter was reset).
The Bound system was introduced in Tekken 6 and returned for Tekken Tag Tournament 2. The Bound system allowed characters to slam the opponent towards the ground in a juggle, which, instead of ending the combo, lifted their bottom half towards the air and left them in a helpless state for a few seconds, giving the player a chance to continue their juggle. Additionally, in stages with breakable floors (Anger of the Earth, Cemetery and Fallen Colony), if the floor is broken at any time, the fighter that is knocked through the floor will have their body react in a similar way.
As of Tekken Revolution, Bound is now only featured in certain moves that function as juggle starters, whereas the Screw replaces the juggle extending properties of Bound in Tekken 7, where Season 2 introduces its counterpart, Wall Bound.
- The Bound as a juggle extension was removed in Tekken Revolution for unknown reasons. Although it is speculated that with the character enhancement system, it would give advanced players too much of an unfair advantage. It was also possibly done to simplify the game and smoothen the learning curve.