What are the most influential first-person shooters?

What are the most influential first-person shooters?

Bill Kunkel (Editor-in-Chief, "Tips & Tricks" Magazine) gives expert video advice on: What are the most influential first-person shooters?; What is one of the best strategy video games available?; What are some of the most influential role-playing video games? and more...

It was all invented by a company called iD who developed a game called Wolfenstein, a 3D that was based on a top-down game from years earlier called Castle Wolfenstein. I guess they thought, "Well, that's kind of cool playing it from birds-eye view, but how much cooler would it be if you could actually be walking down those corridors, running into Nazi soldiers and stuff?" Then they went on to do, of course; Doom, Quake and all those other games. It's now become certainly one of the three most popular categories of gaming.