Quad Damage power-up, Double Damage still grants a significant advantage to its user, but doesn't make them quite the unstoppable force that a Quad-powered player represents. It is likely intended to prevent Quad-fueled runaway victories in multiplayer, though it appears in single-player as well. It is most-likely intended as a method of artificially increasing the difficulty.
In other gamesEdit
Quake III RevolutionEdit
It appears in QIII: Revolution, multypling player damage by 2, it is rarely found in game, new players may see it only at House Of Pain, it will grant a victory because the double damage respawn at 5 minutes.