That's not really ASCII art. I mean it is, but iirc it's custom shader code in Unity made to look like retro style ASCII art. So it's actually way more difficult to make than a grid of ASCII characters.
It would still be trivial for the developer to add an “textshot” feature to export a frame to .txt, so I’d still qualify it as fitting the ASCII art aesthetic.
I was at first confused. Of course "real ttys" have some metal in their back end! (I'm too young and my default mental image of a "real tty" contains a CRT, but there's probably even more metal in a teletype.)
Any pointers on how to set up a grid of ASCII characters? That'd be what I would use tcod for. It seems like it should be easy, but I guess I don't know how to look for it.