One of the best zombie shooters of the last few years can be yours for the low price of zero.
The Humble Store is having a bit of a sale itself to compete with Steam's big Summer Sale. It's not as massive, but that doesn't mean there aren't deals to be had.
And what better deal than getting stuff for free. The store is offering the original Killing Floor completely free. All you need to do is head to the link, add it to your cart and you'll instantly get your Steam key.
This version doesn't come with any DLC, but you can play it in solo or in co-op - how it's best played. If you're looking for more Killing Floor, the Humble Store also has Killing Floor 2 for %50 off. We've rounded up even more deals for you to check out in our weekly post.
The Killing Floor giveaway will be available for another day and six hours as of the time of writing.