Wolfenstein 3D is 20?

Wow, now this makes me feel old. I remember popping in the shareware floppy disks for Wolfenstein 3D and going around shooting Nazis for hours. I think the disk was blue.

Anyway, the game that started the whole first-person shooter genre back in 1992 is celebrating its 20th anniversary with a free in-browser version of the game. In addition to the browser version of the game, Carmack has also dropped off his Director’s Commentary for the game.

Go play Wolfenstein! Now!