Aliens can basically be anything the game developers want--not like traditional zombies. Bug aliens, Predator aliens, Alien aliens, or little grey men aliens all have different behaviors, origins ...

Whoa, whoa, whoa – don't judge this Mini by its name. Yes, this is yet another "zombie" Mini, but Alien Zombie Death is actually a lot of fun and a Mini worthy of your hard-earned money.

And then, almost four minutes into the video explaining this, they casually mentioned that Civ 6's battle royale mode will be getting zombie and alien factions, as well as narration by Sean Bean.