Player gains "rage" or some other vague power from beating up their opponents or doing something else significant, which in turn (briefly) unlocks more powerful moves, additional bonuses or enables other actions/features such as activation of super mode.
Alternate names: Bloodlust, Focus, Adrenaline
The first video game about Rage meter was released on October 15, 2002.
Getting beaten up may also charge the same meter, but usually not, and most of the time when it does, the charging is much slower than bashing people yourself.
* Allows use of abilities that require rage to use at all.
* Empowers abilities.
* Unlocks supermode.
* Passively increases efficiency, especially if this gradually increases.
... these can either become available as soon as you have "sufficient" rage, that is they can be activated early, but can either be used longer, more often, or are even more powerful if rage is allowed to max.
The rage meter often dissipates after some moments of not charging it up, making it available only a limited time and can't be pre-charged, though this is not always so.