10 Best Video Games With An Unseen Enemy

Horizon Zero Dawn is primarily concerned with protagonist Aloy discovering both her own past and that of Earth as a whole.

At game's end, we learn that an unknown force sent a signal to activate HADES, a dormant AI subsystem intended to act as an extinction failsafe in the event that the Earth-restoring Zero Dawn project was a failure.

Though HADES is in effect the main villain of the first game, it's clear that something else out there is pulling the strings, the identity of which is finally revealed at the very end of recent sequel Horizon Forbidden West.

Aloy eventually learns that the signal was sent by Nemesis, a shadowy evil AI that's determined to kill the Far Zenith and is additionally en route to destroy Earth.

Forbidden West leaves things up in air for the inevitable threequel, which will presumably see Aloy and company face off against Nemesis in an all-out battle for Earth.