Ancient mythology states that there was a guardian of Mars known as Ares. He was the "god of war" and every 5000 years of war, a portal from Hell opens and sends all of the evil and dead souls out into the world. Ares had stopped the last war of hell from consuming the universe, but in doing so he sacrificed himself to save everyone. Now 5000 years later, the portal has opened again and the evil and dead souls are roaming around. No one knows where the portal has opened up, but there have been ominous anomalies happening on a Mars base. The Earth’s best forces have been sent to investigate the situation and return the world back to its safe self. Once the Special Forces arrived, they scattered across the base, and in a matter of minutes only one was left. This lone soldier was deep inside the base and had to get out somehow, the best way was through.
These are levels from Episode 2 and 3 both made by ronwolf1705. I don't have too many more to go, but it's enough to be unable to make it to the Christmas release.