
As of
30-day average
69 players18 of 30 days observed
| Data | Collected | Observed since | Last success |
|---|---|---|---|
| News and patch notes | Every 7 days (cool tier) | 20 Oct 2026 | |
| Player counts | Every day (cool tier) | 19 Oct 2026 | |
| Store details | Weekly, and when Steam reports a change | 19 Oct 2026 |
Busier games are polled more often. Source: Steam Web API. Not affiliated with Valve.
Cepheus Protocol is an Open World RTS Military Survival Game. Play as the CERC hunting Patient 0, maintain Quarantine camps, fight dangerous mutations & Rogue Civilian Combatants . There’s nobody else coming, it’s up to you now.

Price now
$19.99Usual price
Lowest we've seen
$15.99−20%, 25 Oct 2026
Sales we've seen
1Deepest −20%, $15.99
| From | Price | Usual | Off |
|---|---|---|---|
| 29 Oct 2026 | $19.99 | $19.99 | — |
| 25 Oct 2026 | $15.99 | $19.99 | −20% |
| Sale | Length | Off | Price | Usual |
|---|---|---|---|---|
| 25 Oct – 29 Oct 2026 | 3 days | −20% | $15.99 | $19.99 |
−20% sale, 25 Oct – 29 Oct 2026: Players averaged about the same as the week before. In the week after, players averaged about the same as the week before.
| Sale | Off | During | Change |
|---|---|---|---|
| 25 Oct – 29 Oct 2026 | −20% | 66−1% | +1% |
Average players from our own counts over the 7 days before each sale, while it ran, and the 7 days after, kept clear of the sales either side. Steam’s big seasonal sales lift the whole store, so not every rise is this discount alone. How we count
| Month | Peak | Average | Polls |
|---|---|---|---|
| November 2026 | 87 | 64 | 5 |
| October 2026 | 109 | 67 | 15 |
| September 2026 | 119 | 44 | Archive |
| August 2026 | 310 | 95 | Archive |
| July 2026 | 206 | 61 | Archive |
| June 2026 | 155 | 76 | Archive |
| May 2026 | 116 | 42 | Archive |
| April 2026 | 84 | 36 | Archive |
| March 2026 | 110 | 55 | Archive |
| February 2026 | 162 | 67 | Archive |
| January 2026 | 191 | 73 | Archive |
| December 2025 | 36 | 16 | Archive |
| November 2025 | 65 | 25 | Archive |
| October 2025 | 69 | 30 | Archive |
| September 2025 | 78 | 23 | Archive |
| August 2025 | 113 | 34 | Archive |
| July 2025 | 61 | 23 | Archive |
| June 2025 | 46 | 21 | Archive |
| May 2025 | 51 | 22 | Archive |
| April 2025 | 59 | 22 | Archive |
| March 2025 | 50 | 21 | Archive |
| February 2025 | 45 | 19 | Archive |
| January 2025 | 67 | 26 | Archive |
| December 2024 | 89 | 31 | Archive |
| November 2024 | 76 | 26 | Archive |
| October 2024 | 55 | 24 | Archive |
| September 2024 | 57 | 27 | Archive |
| August 2024 | 87 | 39 | Archive |
| July 2024 | 66 | 32 | Archive |
| June 2024 | 78 | 31 | Archive |
| May 2024 | 51 | 23 | Archive |
| April 2024 | 91 | 39 | Archive |
| March 2024 | 100 | 40 | Archive |
| February 2024 | 71 | 34 | Archive |
| January 2024 | 112 | 41 | Archive |
| December 2023 | 65 | 33 | Archive |
| November 2023 | 73 | 29 | Archive |
| October 2023 | 83 | 23 | Archive |
| September 2023 | 55 | 20 | Archive |
| August 2023 | 58 | 27 | Archive |
| July 2023 | 116 | 54 | Archive |
| June 2023 | 114 | 46 | Archive |
| May 2023 | 84 | 24 | Archive |
| April 2023 | 50 | 23 | Archive |
| March 2023 | 46 | 22 | Archive |
| February 2023 | 56 | 27 | Archive |
| January 2023 | 80 | 36 | Archive |
| December 2022 | 106 | 39 | Archive |
| November 2022 | 72 | 32 | Archive |
| October 2022 | 92 | 27 | Archive |
| September 2022 | 51 | 20 | Archive |
| August 2022 | 75 | 29 | Archive |
| July 2022 | 87 | 35 | Archive |
| June 2022 | 145 | 52 | Archive |
| May 2022 | 114 | 36 | Archive |
| April 2022 | 41 | 22 | Archive |
| March 2022 | 75 | 33 | Archive |
| February 2022 | 76 | 26 | Archive |
| January 2022 | 89 | 30 | Archive |
| December 2021 | 106 | 45 | Archive |
| November 2021 | 159 | 66 | Archive |
| October 2021 | 377 | 121 | Archive |
| September 2021 | 95 | 43 | Archive |
| August 2021 | 120 | 47 | Archive |
| July 2021 | 66 | 27 | Archive |
| June 2021 | 89 | 29 | Archive |
| May 2021 | 122 | 50 | Archive |
| April 2021 | 195 | 50 | Archive |
| March 2021 | 30 | 14 | Archive |
| February 2021 | 54 | 15 | Archive |
| January 2021 | 22 | 8 | Archive |
| December 2020 | 18 | 7 | Archive |
| November 2020 | 34 | 8 | Archive |
| October 2020 | 28 | 8 | Archive |
| September 2020 | 50 | 15 | Archive |
| August 2020 | 75 | 19 | Archive |
| July 2020 | 29 | 8 | Archive |
| June 2020 | 40 | 14 | Archive |
| May 2020 | 27 | 10 | Archive |