Important Notes
Please note that this is AN ACCOUNT, NOT A CD KEY. You'll receive a username and password to access the account with the assigned product. For Steam : You MAY subsequently add the game to your main Steam account via Steam Family Sharing.
Please be aware that Steam Family Sharing may not be available for all games.
Using Family Sharing for games that are not supported, as well as making purchases on this account,
may result in suspension of your account.
Make sure to check out the Activation Guide.
Serious Sam: Siberian Mayhem is a new stand-alone expansion to the world of the classic FPS series. Join the fight against Notorious Mental on a journey through the wild lands of Russia, and find your way through this lost chapter of Sam Stone's adventures.
Serious Sam: Siberian Mayhem is a new stand-alone expansion to the world of the classic FPS series. Join the fight against Notorious Mental on a journey through the wild lands of Russia, and find your way through this lost chapter of Sam Stone's adventures.
Activation Guide