Sumerian Six follows the Enigma Squad, a team of commandos composed of the world’s greatest scientists who combine their skills to conduct secret missions in their fight against the Third Reich. Together, you seek to thwart ex-member Hans Kammler's nefarious plans involving a powerful, mystical substance named Geiststoff.
Embark on a thrilling journey across multiple continents alongside allies such as the exiled chemist Rosa Reznick, Wojtek the Werebear, and the esoteric psychoanalyst Siegfried von Adelsberg. Dispose of your enemies by using each team member’s unique set of abilities inspired by their fields of expertise, and learn to master the art of chaining them together for devastating effects if you hope to be successful.
As you delve deeper into the Nazi plot, you’ll encounter occult-scientific weapons and ancient Sumerian artifacts linked to Kammler's machinations. A grim future awaits you should the Nazis be victorious, so do your best to prevent that dark timeline from coming true in this real-time tactical stealth adventure.
Demon Nazis
Led by Hans Kammler, a former member of your Squad, the Nazis tap into the occult to create the ultimate Wunderwaffe. Face off against heavily armed, mutated, and supernaturally charged forces, and put your strategic abilities and dexterity to the ultimate test.
Playful Violence Meets Super Science
Sneak your way around Nazi strongholds and dispatch the ever-present watchmen in a variety of ways before taking on the more serious threats before you. Combine your team's dynamic powers in creative displays of tactical might.
Travel the World
Inspired by real places and events, Sumerian Six takes you on a journey through an alternate history where folk stories and conspiracy theories are as real as the Nazi threat.
windows Minimum
OS: Windows 10 x64 Bit
Processor: Intel Core i5-4670K / AMD FX-8350
Memory: 8 GB RAM
Graphics: GeForce GTX 780 / Radeon RX 560X
Storage: 20 GB available space
Directx: Version 11
Additional notes: Low Quality setting, in 720p, producing 30 FPS
Additional notes: High Quality setting, in 1080p, producing 40 FPS
To activate the game, you need a Steam Account
Login or register at the official Steam Website and download Steam client
Install and start application, login with your Account name and Password
Click the Games Menu.
Choose Activate a Product on Steam...
Follow the onscreen instructions to complete the process
After the successful code verification, go to the "MY GAMES" tab and start downloading.
News & Updates
2025-10-31
Monthly Recap – October Edition
Another month has passed and it is time to present our overview for some of the more intriguing news stories in gaming that happened during it! We have prepared interesting pieces about some of the more popular current and upcoming gaming titles like the new DLC of Kingdom Come: Deliverance II, and the Korean mythology-inspired open-world game Project TAL, as well as the shocking CS2 scandal and a dedicated part about the already concluded support for Windows 10.
Haunted by Boredom? It’s Trick-or-Treating Time Again!
Halloween is finally here and as the tradition requires, it is time not only for some monster deals like nowhere around, but also for special treats for our customers! Make an order of over 10€ between 29.10.2025 15:00 CET and 03.11.2025 15:00 CET and you will get our special HALLOWEEN TREAT, which will contain discount codes: 10%, 20% OFF, 25% OFF, discount vouchers: 1€, 2€, 5€, 10€, 20€ or a FREE GAME…
Entering some text requires manually invoking the on-screen keyboard
Some in-game text is small and may be difficult to read
This game does not default to external Bluetooth/USB controllers on Deck, and may require manually switching the active controller via the Quick Access Menu
All functionality is accessible when using the default controller configuration
This game shows Steam Deck controller icons
This game's default graphics configuration performs well on Steam Deck
