Didn't know about what this was until today, but it's intriguing but also Kojima. And I dislike games made by Kojima because they're always way too dramatic.
What I've gathered:
-Scary infection tentacle monsters
-Timeform
-Explosions?
-Babies are the universal panacea
-Kojima should just read SCP Foundation to understand how to make horror without being stupid dramatic
-That baby is important somehow, and has a name that I can't make out
-No shortage of akward camera pans in to the eyes of females, something MSGV also excelled at
-Shadow beasts, and people seem to dissolve into shadows when they die
Theory: Infection came, people die and turn into shadows that eat other people. In some circumstances they also turn into tentacle skeleton monsters. Military tried to fight it (thus tentacle tanks), and there's this really important baby that is immune or something. They're trying to take the baby somewhere but progress is impeded because when you inevitably get eaten by the tentacle people while holding the baby you BTFO of everything around you and jump back in time. Also huge scary monsters, because Japanese horror tropes are a Kojima staple. Not to mention a budget love story wrapped in all of this. Bet there are giant robots involved somewhere too.
101% Kojima
Edit: I figured it out. The baby is that black giant dude's baby and he just wants his baby back so he attacked the entire world and can't kill the protagonist because he is holding his baby hostage. Someone kidnapped an eldritch god's baby and now he's really pissed or something.