Cepheus Protocol
Short description
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
- Publisher
- Halcyon Winds
- Release
- Fri, May 15, 2020
- Price
- $19.99
- Reviews
- 2,943
- Positive
- 77%
- Followers
- n/a
- Owners (estimated)
- 200K – 500K
- Concurrent players
- 20
- Genres
- Action, Adventure, Indie, Simulation, Strategy, Early Access
- Features
- Steam Trading Cards, Steam Workshop, Remote Play Together
- Tags
Review count and SteamSpy's owner range agree well enough to narrow the estimate down to this band. Multiplied by the $19.99 launch price — there is not enough price history for this game to weight the copies by what they actually sold for. Before Steam's cut, VAT and refunds. How these numbers are calculated.
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Media
History
8 data points since Jul 31, 2026. Gaps mean nothing changed — the value carries forward.
The revenue curve is an estimate, not a measurement. It is the only calculated series here: each interval takes the review growth of that period, multiplies it by the sales-per-review factor and by the price actually charged at the time, and adds the result to the running total. That is why it climbs more slowly through discount periods than the review curve next to it. The last point is the same figure quoted above — gross, before Steam's cut, VAT and refunds. How these numbers are calculated.
The blurred area is the rest of the history. 187 further data points reach back to May 1, 2020 — your plan shows the last 90 days of it. How far each series in particular reaches is written on its own chart; not every one of them goes back that far. The shape in the blurred area is decoration, not data: the figures are not in this page at all. Plus unlocks the complete series.
Lowest recorded price: $9.89 on Oct 29, 2020.
Similar games that found an audience
Games sharing at least 3 of this title's leading tags, with enough reviews to have gone somewhere. Ranked by how much they overlap, not by how big they are. − missing and + extra mark the tags each one does not share with Cepheus Protocol. Studio counts the titles that developer has released — the closest thing to production scale that public data allows. It is not a budget, and nobody publishes those.
| Image | Name | Studio | Shared | Tag difference | Price | Reviews | Positive | Released | Revenue (estimated) |
|---|---|---|---|---|---|---|---|---|---|
|
ZED ZONE | Leven Liu first game | 4 | − RTS − Building + Early Access + Open World | $11.99 | 3,470 | 81% | Wed, Mar 29, 2023 | $2.4m $2.4m – $3.3m |
|
DayZ | Bohemia Interactive 33 titles | 3 | − Sandbox − RTS − Building + Open World + Online Co-Op + Multiplayer | $49.99 | 389,527 | 78% | Thu, Dec 13, 2018 | $685m $391m – $782m |
|
Project Zomboid | The Indie Stone first game | 3 | − RTS − Post-apocalyptic − Building + Open World + Multiplayer + Open World Survival Craft | $24.99 | 370,371 | 94% | Fri, Nov 08, 2013 | $417m $250m – $500m |
|
Scrap Mechanic | Axolot Games 2 titles | 3 | − Zombies − RTS − Post-apocalyptic + Multiplayer + Open World + Physics | $28.99 | 109,646 | 92% | Fri, Jul 24, 2026 | $143m $63.6m – $145m |
|
Space Engineers | Keen Software House 5 titles | 3 | − Zombies − RTS − Post-apocalyptic + Space + Open World Survival Craft + Multiplayer | $19.99 | 100,656 | 90% | Thu, Feb 28, 2019 | $90.5m $40.2m – $100m |
There are more like this. Your plan shows the 5 closest neighbours; Plus and Pro show up to 100 — enough to see the shape of a niche instead of a sample of it.