text: Hexen: Beyond Heretic Hexen: Beyond Heretic released by Raven Software in 1995.
  The first to feature multiple character classes with their own weapons; some items also functioned differently based on the class using them.
  Quake
  Quake released in 1996 by ID Software, was the first FPS deathmatch game to feature in-game joining.
  Quake was the first FPS deathmatch game to feature AI operated deathmatch players (bots), although not as a feature of the released product, but rather in the form of a community created content.
  Quake popularized rocket-jumping.
  Notable power-ups that are featured in most consecutive games are i.a. the quad damage. Although the name and/or graphics may be different in other games the concept and feature of the power-up remains the same in other games.
  Unreal
  With the game Unreal (1998, by Epic), the rules were enhanced with some widely accepted improvements:
  spawn protection (usually 2–4 seconds), which is a period of invulnerability after a player (re)enters combat (such as after being killed and respawning); spawn protection was automatically terminated when the player used a weapon (including non-attack usage, such as zooming the sniper rifle). Spawn protection prevents "easy frags" — killing a player which just spawned and is slightly disoriented and almost unarmed.