That’s thanks to its emphasis on teamwork and co-ordination.
You plant bombs, then fend off hordes of aliens.
There’s something missing here.

Each one will introduce a new operator, some new REACT tech, and cosmetics too.
Not to mention an auto-turret that’ll target nasties automatically.
Truthfully, I didn’t get much time with Zofia, nor did I even try out the turret.

That’s because Spillover is hard.
Too hard, I think.
Highlighted around the map are zones pulsing with alien nastiness.

Keep it, and yourselves, in one piece, and it’ll blast the gunk away.
Reader, I and two other players in the preview barely made it through two waves.
“I’ll watch this door, you watch the stairs”, that sort of thing.

But in the end, it was futile.
No matter what we tried, we’d be flattened in a matter of minutes.
At first the hordes were manageable.
Then they pour through the doors.
We all shot and they went down.
But then there’s no chill.
They continuously poured through.
One particularly beefy lad strutted into our chamber and batted one of us to the ground.
Above all, though, Spillover seems at odds with Extraction.
The strengths of Extraction are sidelined here, in favour of a middling horde mode.
By no means is Spillover awful or terrible, it’s justokay.
And for a limited-time mode, that’s not too shabby at all.
I just expected a bit more, you know?