While I'm deep enough into Helldivers 2 to have some qualms (primarily the poor servers buckling under the unforeseen masses + community being pretty nasty at high difficulty levels), I still adore this game and how much of a love letter it is to militaristic sci-fi cinema.
The Shriekers are a currently rare Terminid (the bugs) variant that boast the uniquely terrifying capacity to fly. They're more like freaky insectoid wyverns than, say, locusts, with big leathery wings and scary claws.
My first encounter with them absolutely went like it would in a movie: seeing them flapping in the distance, before they begin to swoop in and cause immediate panic. Shooting them is difficult, but some of us realized we could shoot out their wings and cause them to come crashing down. Others ended up getting swarmed, where it genuinely looks like they try to grab people and drop them from up high.
Eventually we find their freaky, unique nest/spawn site, and struggle to fight through them as we try and figure out how to destroy them (since these nests are shaped like odd tree-like growths, rather than the usual "termite mound holes" you're prompted to toss a grenade into to collapse). But eventually someone calls in the right grade of explosives, and we pick off the rest...
... And then a corpse of one manages to land on me hard enough to crush me instantly.
I love this game.