John Romero, the co-founder of id Software and one of the designers of classic first-person shooter, Doom, recently sat down with Double Fine Productions to play the game and be interviewed for their Devs Play Youtube series.

He discusses how id went about creating each of the levels, and level design in general. The above is the first video of ten; all you have to do is watch (or click) to the end to bring up the next installment.

This Let’s Play is a significant time investment on viewers’ part, but it does give some great insight into the classic FPS, game design, and John Romero. Enjoy!