And he took to Twitter to make it very clear that, while new content is definitely coming to the game via a Season Pass after release, it's not locked content now, so no one is missing out.

"We haven’t even started work on this content yet," he said.

In case you missed it, discovery of the Season Pass which had not been revealed yet came by way of The Callisto Protocol's Steam Page which shared two versions of the game: a Day One Edition release (or 'standard') and a Digital Deluxe Edition which has a substantially higher price point.

The description for the Digital Deluxe Edition revealed a Season Pass featuring these upcoming goodies, post-release:

Outer Way Skin Collection: Bear the armor of the Outer Way, an underground insurgency pitted against the UJC, as you fight to survive the horrors of Callisto.

Contagion Bundle: Discover the ultimate survival horror experience with a new mode, Contagion. With reduced ammo and health drops, a customized difficulty and permadeath – there are no second chances to escape Black Iron Prison or the horrors lurking beneath the surface of Callisto. The Contagion Bundle also includes thirteen new Jacob death animations and the Watchtower Skin Collection.

Riot Bundle: Venture into a previously undiscovered area of Black Iron Prison and battle through waves of brutal enemies. Gather credits to upgrade your weapons, or forge new ones, and survive the onslaught as long as you can in Riot, an all-new mode. The Riot Bundle also includes twelve new enemy death animations and the Engineer Skin Collection.

Story DLC: Dig deeper into the horrifying secrets of The Callisto Protocol.

Initial concerns and reporting around the above suggested this content was already baked into the full game, locked unless people bought into the higher tier's Season Pass, however, The Callisto Protocol creator and game director, Glen Schofield, revealed this is not the case at all.

To be clear: We’re not holding anything back from the main game for the season pass. We haven’t even started work on this content yet. It's all new stuff that we’ll be working on in the new year. Fans have asked for EVEN MORE deaths, so we’re making it a priority next year.

— Glen A. Schofield (@GlenSchofield) November 23, 2022

So, there you go. Nothing has been held back for people who purchase that Day One Edition, they'll just need to pony up down the track for the content as it drops, or simply purchase the Season Pass.

The Callisto Protocol is out for PC and next-gen console this December 2nd. Stay tuned to us for more on the game closer to release.