To celebrate the 20th anniversary of Wolfenstein 3D, the Bethesda Podcast put up a 25-minute director’s commentary video with id Software co-founder John Carmack.

Sure, it’s 25 minutes—but it’s also a very interesting look into the game, and the details surrounding its creation. If you’re interested in Wolfenstein 3D, John Carmack, or just gaming history overall, give it a listen.

As well, as noted at the beginning of the video, you can now play Wolfenstein 3D directly via your browser in honor of the game’s 20th anniversary. If you’d like to do so, just hit the link below.

Source: Bethesda's Wolfenstein 3D Website