Snag chaotic co-op game Ultimate Zombie Defense for free right now, but act fast

Zombies and co-op are the ideal genre mashup. Whether you're surviving the endless rounds in Call of Duty Zombies, pushing through infected hordes in Left 4 Dead, or chopping off limbs in Dead Island, it's always better with friends. This is something that Ultimate Zombie Defense perfectly understands, as it embraces the chaos and teamwork required to make it through unscathed. Now's the time to give it a try, too, because you can add it to your Steam library for free. Don't wait up, though, because this offer isn't sticking around for long.

If you played Call of Duty's Dead Ops Arcade or the original Helldivers, you'll be instantly familiar with Ultimate Zombie Defense. From a top-down perspective, you and your friends need to curtail a growing undead infection, and that means lethal force has been authorized.

Luckily for you, the co-op game comes with a robust base-building system to help you get prepared. You can put down objects like barbed wire, sandbags, concrete barriers, and chain link fences to keep the undead out. It's not all defensive, however, as you'll also have access to turrets, mines, and other military-grade equipment to stave off whatever stumbles into your line of fire. If you're looking for the best zombie games on PC, you can't argue with a free one.

You've also got myriad roles to choose from, with each wildly shifting how you play. There's the heavy, medic, specialist, and engineer at your disposal, and character progression for each that'll help you get even stronger.

This isn't the first time UZD has been offered as a free Steam game. Developer Terror Dog Studio also gave it away last year, which helped the player count shoot up by a staggering 37,000%. This latest giveaway hasn't pushed Ultimate Zombie Defense past that record just yet, but there are still thousands playing it every day.

Terror Dog Studio is giving Ultimate Zombie Defense away for free until Tuesday July 15. Just head here.

If you're looking for more, we've also got all the best multiplayer games and survival games you can play on PC today.

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