We are releasing a previously unreleased alpha version of the game that's dated 05/26/2012, over 3 months before the game released on Xbox 360. This version of the game has been modified to allow it to be played over steam like the current PC versions of Murder Miners, allowing easy play with other players. The current version of the game has been significantly changed, featuring an almost entire re-skin of the game to look and sound like the now released alpha version. There is a chance to permanently unlock a helmet in the old alpha style of the game just by playing both versions. The event also adds a collection of maps from the alpha and original Xbox 360 release versions under a new temporary map category called "Classic Maps". To play the alpha version of the game, all you need to do is go to Murder Miners in Steam, right click it and click "Properties". Under the "Betas" tab you can pick the "Anniversary" branch using the drop down menu, the game will then switch to the alpha, just remember to switch it back later. The event will run for 1 week, ending on ending on 16/09/2021. The alpha version will still be available to play afterwards but the unlockable helmet will not be obtainable after the event has ended. To unlock the helmet, you must launch the the current version of the game at least once after you play the alpha version (possibly until next year). If you wish, all event content can be disabled by adding "NoEvent" to the games steam launch options under "Properties".