Some of these are a real stretch. Revealing that nova gets the eye bleed in egypt is not connected to the eternum mystery, come on.
Yeah, you can make a point that there's some story hints in most of them, but they are rarely major and it's rarely the point.
Warthogs doesn't move the story forward, neither does andromeda, or egypt, or red herring or ekabar or semper invicta. They are there to be fun events with the gang, with some plot sprinkled in at some points.
All of that is fine. This is what Caribdis excells at. Writing fun, funny adventures with a likable gang of people and some sexy scenes. Not everything needs to move the story forward. To me these games are more like slice of life. There's a story and it's fun and interesting, but the point is to have these fun events and excursions.
Red Herring definitely did. Or do you think the gang getting their first gem of doom and encounter with the syndicate doesn't count as story progress?
Warthogs and Semper Invicta does by getting Penny and Nancy into Eternum and defining their roles moving forward (one having a future as a healer while the other as a commander).
Andromeda is essentially foreshadowing to the Bleeding Effect (it's implied that the "Bleeding Effect" is some form of waking dream based on Luna's dialogue of what she said Orion was doing throughout the entire ordeal) and added a lot of fuel to the "is Eternum really a game" question.
Egypt...fine, I'll give you that. But I feel like some of the character trait reveals there (particularly Nova's eye issue) feel like they're going to be a bit significant in the future.
Yeah sure, they are fun events. But they also move the story forward, if a little, as uncovering the truth regarding Benjie's mysterious death also ultimately leads the gang to uncover the truth about the nature of Eternum, the Founder, and whatever reason he has in having millions of players find those damn gems. So every progress they make in the game is crucial to the story, even if it's masked as an in-game activity or bonding moment with the girls. Compare that to "Once in a Lifetime" (Caribdis' first game) where majority of events with the girls absolutely did NOT move the plot forward at all (especially in much of the beginning segments of the story), and only served as ways for the OIAL MC to deepen his relationship with the girls instead of being crucial to the plot.
In fact, I'd dare argue that there's more deliberate plot and lore building in this VN more so than in OIAL (which is not surprising considering that Caribdis is writing this entire thing as a mystery story where you're encouraged to follow the breadcrumbs and keep your eye out for clues and theorize until the inevitable reveal), so to just view all that's happening as "fun events and excursions" feels like it's dismissing the stuff that Cari has been doing as far as the storytelling is concerned.