In honor of the 20th anniversary of “Wolfenstein 3D,” Bethesda has launched a free-to-play browser version of the classic PC game. It’s just as much fun (or something) as you remember it being back in the day. Clicky-clicky here to open the browser game and, yes, it is behind an age gate.

If you’re dying to know more about “Wolfenstein 3D,” check out this (age gate!) Podcast with insight about the creation and development of the game from John Carmack, the technical director of iD Software, while he’s playing the game.