The Unholy War is a PlayStation video game developed by Toys for Bob and published by Eidos Interactive.

The Teknos were hoping that the unusual radiation in Xsarra's atmosphere would mask their ship from the hunter's radar scanners.

A few years later, Katrina, a rogue Quicksilver (a human-like creature that can transform into a silver being), and Andrus, a rebel Dark Angel/Stygian (an experiment gone wrong that created humans with wings), escaped into the wastelands to hide.

In strategy mode, the overview map is made of a series of interlocking hexagons (called Hexes).

On most maps, both sides have a base occupying a single Hex that can be used to buy or sell units.

The player can get an extra 20 or 40 AUR at the start of every turn, provided the Hex stays occupied.

In between each level, the player gradually receives more information on the game's story by an unknown being called "the observer".