DLC in this context is pretty widely understood to mean in game content. So additional areas, cosmetics, missions, etc. not the soundtrack. Steam just categorizes the soundtracks as DLC for games in general.

Helldivers 2, and the recently announced requirement starting at the end of the month to have a PSN account for a game many people bought a month or so ago on Steam.

If there was any confidence this is a homegrown design, I’d agree. But in all likelihood, they’ve just reverse engineered and copied Intel architecture and claimed it’s their own.