The odd exception being, halflife (1/2)
Apparently those games have a ton of unused lore that actually does a realistic invasion scenario from a dyson-sphere level civilization.
So in that case, it was called the "7-hour war" for a reason.
No half life is very dumb. The aliens invade using largely small arms weapons. It is called the 7 hour war because a guy surrenders on behalf of earth after 7 hours.
If anyone imagines fighting alien invaders with small arms they’re already stupidly out of touch.
So in that case, it was called the "7-hour war" for a reason.