That's how we used to do it in the 90s-2000s yea but.. there's not really a need for that anymore. If anything that method used to introduce more corruption because you could have a massive game archive straddle two part files which was more likely to fail.
As I've said - it's not about what is right or wrong here. It's irrelevant to the problem.
It's about what is still the most common approach (because that 90s-2000s is still the way to go for vast majority of the releases in 2020s, probably out of habit at this point) that teaches people to expect one thing and not the other. Problem is not with the packaging itself but the lack of simple information to NOT expect it to self-unpack.
I know it's not needed anymore and it causes potential corruption problems (which is downright annoying if you deal with over 100 parts and there are no repair data).
I don't honestly care how you guys do it. I touch this game once a year.
All I'm saying here is that people
WILL bring this up over and over and over again because this is the same kind of shit that's been happening with every freaking update. One short info will save us a lot of spamming, believe me.
Does this actually happen?
Yeah, if I recall correctly, it is a parasite pregnancy from the third Infectian boss (the spider one?). These parasites are essentially like fucked up clones of the original infected, so they keep personality and habits. Don't remove these unique parasites and you will have special scenes/events for that.