The Rage System is a gameplay system introduced in Tekken 6. Rage activates when a player is low on health, giving the fighter's health bar a red glow, the fighter a red aura and increasing the damage output of their moves. It works similarly to the Revenge Gauge in the Street Fighter IV series as both mechanics give losing fighters the opportunity to turn the tide of battle in their favor.
The rage system resembles the Netsu Power system in Tekken Tag Tournament, in which an off screen character's health bar would glow red and their damage output would be increased if their tag partner had taken a certain amount of damage.
Rage was introduced in Tekken 6. Characters gain a red aura around themselves and their life bar and an increased damage output. Initially, characters gained rage when they reached 10% of their full health but this was changed to 5% in later builds.
Rage can be customized in the scenario campaign mode. Players can equip costumes and items that increase the damage output and health level trigger of rage status.
The Rage System was expanded upon in Tekken Tag Tournament 2. Similar to the Netsu Power system, an off screen fighter will gain rage if their tag partner has sustained a certain amount of damage. Having a partner in rage status also allows them to perform a Tag Crash, a move that lets them "crash" into their opponent to interrupt a combo.
The Rage system functions the same way it did in Tekken 6 when playing the game's 1-on-1 fight mode.Rage Art while in rage. Using a Rage Art removes a fighter's rage status, so the damage increase will no longer be in effect once the move has been executed.
Tekken 7: Fated Retribution added two new features to the Rage System. The less health a fighter has the higher the damage increase they will receive while in Rage. Rage Drives, powerful modified versions of regular moves similar to EX Specials in the Street Fighter series, were also added. Rage Drive's generally open up combo opportunities or extend existing combos. As with Rage Arts, using a Rage Drive will remove a character's rage status.
Rage activates when a fighter is at roughly 20% of their full health in Tekken 7.