On this date in 1992, Wolfenstein 3D was released, defining the FPS genre and bringing it into the mainstream with the help of Doom, which was released a year later.
To celebrate, id has released a free browser version of the game that started it all. For more mobile-friendly free Nazi blasting, the iPhone version is also currently free.
If you're hungry for more Wolfenstein, there's also a director's commentary video with John Carmack you can check out on YouTube.
PROTIP: To defeat Hitler, shoot at him until he dies.
