Region Information

This product is available in multiple regions. Please select your region from the dropdown box before adding to your cart.

Immediately after payment, you will receive a unique and unused activation code for the option you selected, delivered via our Autokey page.

This product is a brand new and unused Mayhem in Single Valley CD Key for Steam.

Immediately after payment, you will be sent a unique and unused CD Key which can be activated on Steam. You can collect this activation code from our Autokey page.  Simply enter your code into the Steam client (available free from steampowered.com). This will then grant you to a full digital download of the game.

How does our website work?

CJS CD Keys sell brand new CD Keys either taken directly from brand new sealed copies of the game, or sourced directly from world-leading game publishers. We source our keys in bulk directly from leading distributors and publishers, which reduces shipping costs.  This enables us to offer instant online delivery, at extremely competitive pricing.

After you receive your key, you can activate the game on the Steam client (available free from steampowered.com). After you activate the game with the Steam software, you can download the game immediately and instantly.

Benefits of buying from CJS CD Keys:

Instant Delivery

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Regional Availability

This product key we are selling is sourced directly from the publisher, or an official distributor of the game publisher. The key is completely region free and includes all languages. Region free means that you can activate the product code from anywhere in the world.

About Mayhem in Single Valley:

Sometimes you have a bad day, and sometimes you wake up and accidentally start the apocalypse. Meet Jack, a mischievous kid with a twisted family, his trusty slingshot, and endless bad luck. In this action-adventure, it’s up to you to stop the monstrous swarms at the end of the world, and make it back to the dinner table in time.

Save the world, and keep the town together - It ain’t simple being the sole hero of a quiet town. As Single Valley begins to crumble, you’ll uncover the town’s hidden secrets along the way. What’s scarier - hidden family history, the strange truth of your neighbors, or an adventure game breaking down its fourth wall right on its Steam page?



Apocalyptic monsters have feelings too - The creatures you’ll encounter in Single Valley all have their own likes/dislikes to learn - if you take a moment to watch them scurry around and destroy things... You don’t always have to kill, you can play their behaviour against them and get inventive!



Hey, at least the end of the world creates some fun puzzles to solve! - The reality of Single Valley is breaking apart! To save us all, you’ll need to raft over poisonous rivers, take class at the Elementary School of Ghosts, clone yourself, and even navigate the perilous trials of earning your father’s approval.

Languages Supported:

Chinese, English, French, German, Italian, Japanese, Korean, Portuguese - Brazil, Russian, Spanish