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Lead an unlikely team of commando scientists behind enemy lines to fight Nazis, uncover arcane mysteries, and wield experimental technology to turn the tide of WWII in this real-time tactical stealth adventure.

| Poll | Players |
|---|---|
| 11:16 UTC | 14 |
| 5 Nov, 11:15 UTC | 6 |
Player counts over time, as we observed them.
Source: Steam Web API, ISteamUserStats/GetNumberOfCurrentPlayers. Full methodology
| Month | Avg players | Kept | Compared with other games |
|---|---|---|---|
| LaunchSeptember 2024 | 84 | — | The busier of its first two months |
| 3 months onDecember 2024 | 29 | 35% | About average (better than 65% of 9,249 other games) |
| 12 months onSeptember 2025 | 14 | 17% | About average (better than 45% of 7,788 other games) |
Sumerian Six kept 35% of the average players it had at its launch in September 2024 after 3 months and 17% after 12 months. Monthly averages, ranked against every game we can score. How we count
| Month | Average | Change | Change % | Peak |
|---|---|---|---|---|
| November 2026Nov 2026 (so far) | 12 | −2 | −16.8% | 20 |
| October 2026Oct 2026 (from 19 Oct) | 15 | −8 | −35.6% | 27 |
| September 2026Sept 2026 | 23 | +5 | +25.5% | 62 |
| August 2026Aug 2026 | 18 | −3 | −14.1% | 46 |
| July 2026Jul 2026 | 21 | −4 | −15.6% | 62 |
| June 2026Jun 2026 | 25 | +14 | +127% | 67 |
| May 2026May 2026 | 11 | −8 | −41.5% | 31 |
| April 2026Apr 2026 | 19 | −14 | −42.1% | 50 |
| March 2026Mar 2026 | 32 | +20 | +155.5% | 85 |
| February 2026Feb 2026 | 13 | −4 | −22.4% | 29 |
| January 2026Jan 2026 | 16 | +3 | +18.2% | 38 |
| December 2025Dec 2025 | 14 | +2 | +14.1% | 33 |
| November 2025Nov 2025 | 12 | −1 | −8.2% | 32 |
| October 2025Oct 2025 | 13 | −1 | −5.8% | 32 |
| September 2025Sept 2025 | 14 | −1 | −9.6% | 43 |
| August 2025Aug 2025 | 16 | 0 | +0.6% | 40 |
| July 2025Jul 2025 | 15 | +5 | +42.9% | 43 |
| June 2025Jun 2025 | 11 | −7 | −40.4% | 33 |
| May 2025May 2025 | 18 | +4 | +30.9% | 65 |
| April 2025Apr 2025 | 14 | −3 | −17.4% | 37 |
| March 2025Mar 2025 | 17 | −7 | −29.9% | 42 |
| February 2025Feb 2025 | 24 | +1 | +5.7% | 72 |
| January 2025Jan 2025 | 23 | −6 | −22.1% | 71 |
| December 2024Dec 2024 | 29 | +9 | +43.2% | 72 |
| November 2024Nov 2024 | 20 | −11 | −35.1% | 63 |
| October 2024Oct 2024 | 31 | −52 | −62.7% | 76 |
| September 2024Sept 2024 | 84 | — | — | 265 |
Average and peak concurrent players each month, and the change in average players from the month before. Months before October 2026 are from a licensed historical archive.