text: Notable power-ups that are featured in most consecutive games include the soul spheres. 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.
  Corridor 7: Alien Invasion CD version
  Corridor 7: Alien Invasion released by Capstone Software in 1994.
  The first FPS to include multiple character classes.
  The first FPS to include DM specific maps.
  Rise of the Triad
  Rise of the Triad was first released as shareware in 1994 by Apogee Software, Ltd. and honed an expansive multiplayer mode that pioneered a variety of deathmatch features.
  It introduced the Capture the Flag mode to the first-person-shooter genre as Capture the Triad.
  It was the first FPS to have an in-game scoreboard.
  It was the first FPS to deliver its level of multiplayer customization through a plethora of options affecting aspects of the level played like gravity or weapon persistence.
  It was the first FPS to have voice macros and the ability to talk to players via microphone.
  It introduced a unique point system that awards different numbers of points for different kills (for instance, a missile kill is worth a point more than a bullet kill).