Doom Eternal will have three free Doomguy skins at launch and all of them rock an aluminum four-pack of rectus abdominis.

You can put more Men’s Health in your Doom Eternal by having the re-releases of Doom, Doom 2 and/or Doom 3, plus a Slayers Club card and a Bethesda.net account. Link the latter two, and a skin corresponding to the game (indigo, bronze and red, respectively) will be in Doom Eternal when that launches.

And that at last solves the mystery of why the classic Dooms pestered people for Bethesda.net logins back in July! Bethesda quickly patched out the goof, which effectively tied the games to an Internet connection and gave rise to a day-zero meme and multitudes of social media dunks. When Bethesda fixed the mistake, they explained that they had put it in so they could reward Slayers Club members for playing the classics. Now we know the reward.

Doom, Doom 2 and Doom 3 are available ($4.99 for the first two, $9.99 for the third) on PlayStation 4, Xbox One and Nintendo Switch. Doom Eternal launches on Nov. 22 on all of those platforms plus Windows PC.

Correction: That guy mentioned to us that a previous version of this story incorrectly referred to Doomguy’s muscular anatomy. This post has been revised.