is a strictly single-player experience. However, the "online" aspect of the search query refers to two distinct community phenomena: The Cyber Grind Leaderboards:
With the Earth dry of blood, machines like V1 enter Hell to harvest the blood of the damned. The game blends 90s-style FPS carnage (like
If you want the real hot version—the one with the new "7-S: Something Wicked" secret level and the alt-fire for the Sawblade Launcher—you need the official Steam release.