Epic Games gave away Alien Isolation for free a few weeks back, even though I already had it for PS4 and beat it a coupe times already, I downloaded it anyway. I found this streamer that used to do Isolation speedruns, but the past couple years he's been playing modded Alien Isolation with multiple Xenomorths.
He has this discord group that has several mods that you can download. They're all basically multiple aliens. So instead of 1 Xeno, it's anywhere from 2-6 Xenos depending on the level.
They also just came out with an invisible Alien mod, you can do just the 1 Xen