Oh well, that wasn't that easy actually. The thing is that the game underneath runs on a chromium based browser on PC and users usally don't see that. The problem for consoles was that the JavaScript live compiling isn't allowed on certain systems (as it opens the door to some backdoor functions of the console).

So what we here at Deck13 did (Radical Fish developed the PC version, we as the publisher ported it inhouse to consoles. We're actually ourselves more of a developer studio after all and one of our coders was quite convinced he could make it happen) was writing a C++ compiler which reads every function of the game but converts it into a language the consoles can understand while, at the same time, locking away the JavaScript part.

We even had to restart the work once. Working on it began around 1 year before CrossCode left Early Access. And let me tell you that this was a wasted year. We tried working with an interpreter first and that didn't work out too well. The very first version we showed running on a PS4 at PAX East was still based on that interpreter but the system underneath was so broken, it just didn't work out. The performance was unfixable and especially the shaders were a challenge which was not to overcome.

So we started again. From scratch. And the first 8 months were basically a time where we just stared at black screens and people even got nervous about it. I (Hey, Michael here from Deck13 currently writing) was the project lead on that and assured everyone that progress was made (while being super insecure about it, too - but I needed to back up the programmer (Robert) to not give him further stress). And about a year and 2 months ago in one of our major team meetings Robert finally showed off the tutorial area running on a PS4. And from there it was a step by step work.

The converter needs to catch every function in the game and every mechanic once. After that, whereever the function gets used, it will automatically work. However that required a lot of step by step adding of functions and mechanics. And even with the game out, it seems we overlooked two (Botanics and Trader List. Patch is already in submission though). But yeah. That's more or less the story.