Data source: Steam Web APILast updated: How we collect this data
Cepheus Protocol player count chart
Cepheus Protocol has a small but active player base. 77 people are playing it on Steam right now. Over the last 30 days its player count has been growing (up 44% on the month before).
History from May 1, 2020
Cepheus Protocol monthly player count
| Month | Avg. players | % Gain | Peak players |
|---|---|---|---|
| November 2026 | not enough data | -14.18% | 115 |
| October 2026 | 66 | +78.38% | 134 |
| September 2026 | 37 | -61.74% | 119 |
| August 2026 | not enough data | +50.97% | 311 |
| July 2026 | not enough data | +32.9% | 206 |
| June 2026 | not enough data | +33.62% | 155 |
| May 2026 | not enough data | +38.1% | 116 |
| April 2026 | not enough data | -23.64% | 84 |
| March 2026 | not enough data | -32.1% | 110 |
| February 2026 | not enough data | -14.74% | 162 |
| January 2026 | not enough data | +427.78% | 190 |
| December 2025 | not enough data | -44.62% | 36 |
| November 2025 | not enough data | -5.8% | 65 |
| October 2025 | not enough data | -11.54% | 69 |
| September 2025 | not enough data | -30.97% | 78 |
| August 2025 | not enough data | +85.25% | 113 |
| July 2025 | not enough data | +32.61% | 61 |
| June 2025 | not enough data | -9.8% | 46 |
| May 2025 | not enough data | -13.56% | 51 |
| April 2025 | not enough data | +18% | 59 |
| March 2025 | not enough data | +11.11% | 50 |
| February 2025 | not enough data | -32.84% | 45 |
| January 2025 | not enough data | -24.72% | 67 |
| December 2024 | not enough data | +17.11% | 89 |
| November 2024 | not enough data | +38.18% | 76 |
| October 2024 | not enough data | -3.51% | 55 |
| September 2024 | not enough data | -34.48% | 57 |
| August 2024 | not enough data | +31.82% | 87 |
| July 2024 | not enough data | -15.38% | 66 |
| June 2024 | not enough data | +52.94% | 78 |
| May 2024 | not enough data | -43.96% | 51 |
| April 2024 | not enough data | -9% | 91 |
| March 2024 | not enough data | +40.85% | 100 |
| February 2024 | not enough data | -36.61% | 71 |
| January 2024 | not enough data | +72.31% | 112 |
| December 2023 | not enough data | -10.96% | 65 |
| November 2023 | not enough data | -12.05% | 73 |
| October 2023 | not enough data | +50.91% | 83 |
| September 2023 | not enough data | -5.17% | 55 |
| August 2023 | not enough data | -50% | 58 |
| July 2023 | not enough data | +1.75% | 116 |
| June 2023 | not enough data | +35.71% | 114 |
| May 2023 | not enough data | +68% | 84 |
| April 2023 | not enough data | +8.7% | 50 |
| March 2023 | not enough data | -17.86% | 46 |
| February 2023 | not enough data | -30% | 56 |
| January 2023 | not enough data | -24.53% | 80 |
| December 2022 | not enough data | +47.22% | 106 |
| November 2022 | not enough data | -21.74% | 72 |
| October 2022 | not enough data | +80.39% | 92 |
| September 2022 | not enough data | -32% | 51 |
| August 2022 | not enough data | -13.79% | 75 |
| July 2022 | not enough data | -40% | 87 |
| June 2022 | not enough data | +27.19% | 145 |
| May 2022 | not enough data | +178.05% | 114 |
| April 2022 | not enough data | -45.33% | 41 |
| March 2022 | not enough data | -1.32% | 75 |
| February 2022 | not enough data | -14.61% | 76 |
| January 2022 | not enough data | -16.04% | 89 |
| December 2021 | not enough data | -33.33% | 106 |
| November 2021 | not enough data | -57.94% | 159 |
| October 2021 | not enough data | +297.89% | 378 |
| September 2021 | not enough data | -20.83% | 95 |
| August 2021 | not enough data | +81.82% | 120 |
| July 2021 | not enough data | -25.84% | 66 |
| June 2021 | not enough data | -27.05% | 89 |
| May 2021 | not enough data | -37.44% | 122 |
| April 2021 | not enough data | +550% | 195 |
| March 2021 | not enough data | -44.44% | 30 |
| February 2021 | not enough data | +145.45% | 54 |
| January 2021 | not enough data | +22.22% | 22 |
| December 2020 | not enough data | -47.06% | 18 |
| November 2020 | not enough data | +21.43% | 34 |
| October 2020 | not enough data | -44% | 28 |
| September 2020 | not enough data | -33.33% | 50 |
| August 2020 | not enough data | +158.62% | 75 |
| July 2020 | not enough data | -27.5% | 29 |
| June 2020 | not enough data | +48.15% | 40 |
| May 2020 | not enough data | n/a | 27 |
How many people are playing Cepheus Protocol?
At this moment Cepheus Protocol has 77 concurrent players on Steam. That makes it the #3,092 most played game on Steam at the moment. In the last 24 hours it peaked at 77 players. Today's peak is 13% below its 30-day average daily peak of 88.
Cepheus Protocol player count trend
Over the last 30 days Cepheus Protocol averaged a daily peak of 88 players, up 44% compared with the 30 days before (61). Its highest point this month (134) is 106% above the same period last year (65). In its first month after release (May 15, 2020) it peaked at 40 players. Today's player count is 20% of its all-time peak of 378, set on Oct 1, 2021.
Best time to play Cepheus Protocol
Based on the last 14 days, Cepheus Protocol is busiest around 21:00 UTC (4 PM in New York) and quietest around 08:00 UTC (3 AM in New York), when about 52% fewer people are online. For the fastest matchmaking, play close to the peak hour.
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Compare Cepheus Protocol with similar games
Player counts, peaks, reviews and prices side by side. Compare any Steam games
About Cepheus Protocol
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.
- Developer
- Halcyon Winds
- Released
- May 15, 2020
- Genre
- Action, Adventure, Indie, Massively Multiplayer, RPG, Simulation, Strategy, Early Access
- Steam Deck
- Playable
- Languages
- 9 languages, 1 with full audio
Screenshots
Cepheus Protocol price history
Good time to buy? Probably wait for a sale. Cepheus Protocol is at its full price of $19.99. It usually goes on sale for about 20% off (around $15.99), and the lowest we have recorded is $15.99.Next Steam sale: Steam Winter Sale, Dec 17 to Jan 4. See the countdown
US price on Steam. Checked daily.
How many copies has Cepheus Protocol sold?
We estimate Cepheus Protocol has sold 56K to 140K copies on Steam, based on how many Steam reviews it has. At the prices it has actually sold for, that is roughly $890K to $2.3M in gross revenue.
Cepheus Protocol reviews by language
- English91%
- Chinese (Simplified)9%
Share of Steam reviews written in each of the 11 biggest Steam languages. It shows where the game's players are, roughly.
These are estimates, not official sales figures. How we estimate sales.
Get Cepheus Protocol alerts by email
Cepheus Protocol reviews over time
Positive and negative Steam user reviews per month, from Steam's review history.
Cepheus Protocol achievements
Cepheus Protocol has 5 Steam achievements. On average a player has unlocked 45.6% of them; the rarest, Build the Artillery Unit, is held by 19.6% of players.
Into the Deep EndIt Begins.... Your first steps on Treasure Island80.8%- And so it begins....Survive your first day on the island65.3%
- Didn’t go as planned…Hidden achievement34.2%
- Avid ListenerListen to a custom music track28.0%
- Build the Artillery UnitHidden achievement19.6%
Global unlock rates from Steam, most common first.
Cepheus Protocol DLC
Cepheus Protocol has 7 DLCs and soundtracks on Steam, newest first.
Latest Cepheus Protocol news and patch notes
- Sep 4, 2026 2026.9.4 Experimental Patch Notes & September Development Update
- Aug 21, 2026 2026.8.21.1 Experimental Patch Notes & August Development Update
- Aug 13, 2026 2026.8.13.1 Now Out: Final Push to Escalation
- Aug 5, 2026 2026.8.4.1 + 4.2 Experimental and Normal Patch Notes
- Aug 1, 2026 2026.7.31.3 Quality of Life Update Live + GPU Fog of War Tonight on Experimental
- Jul 28, 2026 2026.7.27 CERC OPS Arrives on Experimental Plus Major Fixes
- Jul 24, 2026 World Reveal of CERC Ops This Saturday!
- Jul 20, 2026 Massive Performance Gains and Smarter Fog of War Are Coming
Official announcements from the developer on Steam.
Cepheus Protocol FAQ
Is Cepheus Protocol dead?
Cepheus Protocol has a small but active player base. 77 people are playing it on Steam right now. Over the last 30 days its player count has been growing (up 44% on the month before).
How many people play Cepheus Protocol?
77 people are playing Cepheus Protocol on Steam right now. In the last 24 hours it peaked at 77 concurrent players.
What is the all-time peak player count for Cepheus Protocol?
Cepheus Protocol reached its all-time Steam peak of 378 concurrent players on Oct 1, 2021.
Is Cepheus Protocol growing or declining?
Cepheus Protocol is growing. Its average daily peak over the last 30 days was 88, up 44% compared with the previous 30 days.
When is Cepheus Protocol most active?
Cepheus Protocol usually has the most players around 21:00 UTC (4 PM in New York) and the fewest around 08:00 UTC (3 AM in New York).
How much does Cepheus Protocol cost?
Cepheus Protocol costs $19.99 on Steam in the US. Prices are checked daily and can differ by region.
What is the lowest price Cepheus Protocol has been on Steam?
The lowest US price we have recorded for Cepheus Protocol on Steam is $15.99 (20% off), on Oct 20, 2026. It costs $19.99 right now.
Is Cepheus Protocol on sale right now?
No, Cepheus Protocol is at its full price of $19.99 on Steam right now. In past sales it usually dropped about 20%, and the biggest discount we have seen is 20%.
Is Cepheus Protocol good?
Steam players rate Cepheus Protocol Mostly Positive: 78% of 3,032 reviews are positive.
When did Cepheus Protocol come out?
Cepheus Protocol was released on Steam on May 15, 2020.
Who made Cepheus Protocol?
Cepheus Protocol was developed by Halcyon Winds.
Is Cepheus Protocol still worth playing?
Cepheus Protocol has a smaller but active community on Steam today (77 playing right now), and players still rate it well (Mostly Positive).
How many copies has Cepheus Protocol sold?
We estimate Cepheus Protocol has sold 56K to 140K copies on Steam, based on how many Steam reviews it has. This is an estimate, not an official figure, because Steam does not publish sales.
RageQuit Charts is not affiliated with Valve Corporation. Steam and the Steam logo are trademarks of Valve Corporation. Player counts come from the official Steam Web API.