This product is a brand new and unused Serious Sam 4 Digital Download Key for Xbox Series X.  After your payment, you will receive an unused activation key, which can be entered into your Xbox in order to get a full digital download of the game.

This is an unused CD Key for the game, which you can enter into the Xbox Live website / store, in order to redeem a full download of the game.

This game does not work on Xbox One

We sell this game code for various regions around the world.  Please select your own region when purchasing the key, or choose a region-specific key from the available region options.

Regional Availability

We sell this product for all regions.  Please select your region when adding to cart.  We also offer discounted region-specific keys that require activation from specific countries.

Regional Version Information:

This product may be available in different regional versions. Please choose the version intended for your account region and carefully review the activation requirements before purchasing.

Unique and Unused:

This activation key can only be activated once.  Once activated, it will be permanently bound to your online Xbox Live account. You can download this game using Xbox Live as many times as you want.

A fully functional product key, or your money back!

CJS Keys are commited to delivering genuine games at the best possible prices, with 100% customer satisfaction rate.  We will ensure that all customers receive a fully working CD Key, or a full refund.

About the Game

Humanity is under siege as the full force of Mental’s hordes spread across the world, ravaging what remains of a broken and beaten civilization. The last remaining resistance to the invasion is the Earth Defense Force led by Sam “Serious” Stone and his heavily-armed squad of misfit commandos. Croteam returns with a high-powered prequel to the Serious Sam series that scales up chaos to unprecedented levels. The classic Serious Sam formula is revamped by putting an unstoppable arsenal up against an unimaginable number of enemies that requires players to circle-strafe and backpedal-blast their way out of impossible situations. Features HORDES OF INVADERSThe iconic cast of alien invaders returns with some new reinforcements! Fight your way through unbelievable numbers of Mental's minions including the iconic Headless Kamikaze, Beheaded Rocketeer, Kleer, Scrapjack, Werebull, and Khnum! Square off against brand new enemies and towering monsters like the frantic Processed, repulsive Belcher, the hard-hitting Zealot, and more. EXPLOSIVE ARSENALArmed with a slew of devastating weapons, pick your tool for any situation. Lay waste to Mental's Horde using the powerful double-barreled shotgun, the punishing minigun, the powerful chainsaw launcher, a brand new auto shotgun, and the iconic cannon. Upgrade your toys, and enjoy the violent beauty of the lock-on rocket launcher, and the mighty laser beam of death. COOPERATIVE MAYHEMSmash through the action-packed campaign with friends in 4-player online co-op mode! Tackle exciting primary missions and thrilling side quests in modified difficulties for an extra challenge. LEGION SYSTEMSerious Sam 4 unleashes some of the biggest moments in the series’ history with the new Legion System and battlefields teeming with thousands of enemies!

Languages Supported:

English, French, German, Italian, Portuguese, Russian, Spanish, Turkish