Something ancient and malevolent has crossed over from another dimension and filled the world with monstrous creatures. The few humans left can open gateways to other realms, and you play a survivor who steps through them to scavenge supplies, uncover where the threat came from and fight back toward a safer foothold. It is a third-person shooter with RPG progression.
Gunfire Games built it for solo play or online co-op with up to two others. Hordes and large bosses keep the combat busy, and the worlds you visit differ between playthroughs. It suits players who like tough, loot-driven shooters and prefer to tackle them with a small team of friends.