text: "suicide-cause tracking" – if a player dies by "suicide" that was caused by some other player's action, such as knocking him off the cliff or triggering a crusher or gas chamber, the player that caused such death is credited the kill and the killed player does not lose a frag (it's not counted as a suicide). This concept increases the entertainment potential of the game (as it gives players options to be "cunning"), but it at the same time adds complexity, which may be the reason why Epic's main competitor, Id software, did not implement this concept into Quake III Arena (just as they did not implement spawn protection).
  Unreal Tournament
  "combat achievements tracking" – Unreal Tournament (1999, by Epic) added statistics tracking. The range of statistics being tracked is very wide, such as:
  precision of fire with each weapon (percentage of hits to fired ammunition)
  kills with each weapon, being killed by particular weapon, and being killed when holding particular weapon.
  headshots (lethal hits of combatant heads with sniper rifles and some other powerful weapons)
  killing sprees: Killing 5, 10, 15, 20 or 25 combatants without dying is called a killing spree, each greater kill count being considered more valuable and having a unique title (respectively; Killing Spree, Rampage, Dominating, Unstoppable, Godlike). The game tracked how many times has the player achieved each of these titles.