1990s (Analysis of Games)

• Rainbox Six (Analysis of Games)

Half-Life

• https://www.rockpapershotgun.com/2016/10/03/marc-laidlaw-half-life/#more-402769

• I think it's really interesting that Doom and Halflife basically have the same plot, except replace demons from hell with alien monsters.

  Shady government black-project corporation experiments with teleportation
  Some shit goes wrong, portals are opened, hellspawn/aliens swarm over the facility
  One guy has to fight his way through, find the portal, go through it to their home dimension, and shut them down (Source)