Two weeks ago Nexon updated Combat Arms with the intense new mode called Cabin Fever, which pits players in a cooperative bid to fend off zombies, and since the time of the release gamers have racked up more than 278 million zombie kills.

According to Graham Kays, Producer for Combat Arms…

“Cabin Fever has spread across our servers like the very mutation players are trying to stop in the game,” … “Players might take their lumps in the end but they’re enjoying the ride so much they keep coming back to kill more and more zombies.”

So, technically, this is like Left 4 Dead but free? Hmm, it almost makes you question why it would be worth bothering with a game you pay to play when you could muster up a little download time for this free-to-play game, which also features weapon customization, character customization, RPG-style leveling, and item acquirement.

You can learn more about the Cabin Fever mode and other features by dropping by the Official Combat Arms Website.