Bad news for modders. From their FAQ:

The types of files that can be modified:

• Animations
• Textures
• Models
• Videos
• Sounds
• Shaders (only on PC)

Modification of any other file types (like scripts, configs or libraries) is not allowed and the files will not be loaded by the game and accepted by moderation.

So it looks like they are dropping the vast majority of existing mod support despite the new Steam Workshop integration. I guess we won’t see updated versions of Anomoly or any of the other mods that kept the game alive and popular all this time.

The limitation on modified configs is especially baffling. In the old games they were the primary way of fixing the game’s jank, and you shouldn’t be able to make anything malicious with them (short of bad entries that crash the game).

IIRC the old XRay engine is open source (or the source leaked and the devs gave the okay for modders to improve it), so here’s hoping someone can reverse engineer and backport any major improvements this edition adds to the originals.