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Cepheus Protocol is an action RPG released in 2020 with Massively Multiplayer elements. It has garnered 2,830 Steam reviews. The developer attribution is currently unknown.
Overview
Cepheus Protocol is a 2020 Action game developed by Halcyon Winds and published by Halcyon Winds. On Steam it has gathered 3,683 player reviews, 76% of them positive, which counts as a mostly positive reception among indie titles in the Action category. The game is available on windows, and launched at $20. The pairing of developer Halcyon Winds with publisher Halcyon Winds is one of the studio-publisher relationships indielist tracks, letting players find comparable games and letting developers and investors study how Action projects reach the market. indielist's white-box method estimates its lifetime sales at roughly 144,000 to 335,000 units, with the full Boxleiter factor breakdown shown on this page rather than a single black-box figure. Within indielist's catalog of indie games mapped to their studios, publishers, and funding, Cepheus Protocol can be compared against similar Action titles and benchmarked on review counts and estimated sales.
Reviews
3,683
Positive
76%
Steam appid
979640
Engine
Unknown
Players (snapshot)
48
Historical snapshot ·
Sales estimate
v1.0144K to 335K
units (median: 239K)
≈ $1.6M to $3.8M modeled net revenue (fixed store-cut, refund, and regional-price assumptions applied)
+ - How is this calculated?
| Factor | Adjustment |
|---|---|
| base | +50 |
| year_2020 | +15 |
| price_$20 | 0 |
| positive_76% | 0 |
| final NB | 65 |
Heuristic display range: median × [0.6, 1.4]. Boundary protection: NB ∈ [15, 150].
Methodology & limitations
Sales estimates use an additive Boxleiter-derived heuristic against public Steam review
counts. They are not authoritative sales data, and the fixed display range
is not a statistically validated confidence interval. Actual results may fall outside it,
especially for deeply discounted or bundle-heavy titles. Algorithm version
v1.0. Read the exact method and validation status.
indielist estimates lifetime unit sales for Cepheus Protocol at roughly 144,000 to 335,000 copies, with a median around 239,000, derived from its 3,683 Steam reviews using a multi-factor Boxleiter method (version v1.0). That median maps to approximately $2.7M in net revenue after Steam's 30% cut, regional pricing, and refunds. Unlike black-box trackers, the full calculation is shown on this page: a base review-to-sales multiplier is adjusted for release year, launch price, review sentiment, studio size, and genre, and every adjustment is listed so developers, publishers, and investors can audit exactly how the figure was reached. The range itself reflects genuine uncertainty — review-to-sales ratios vary widely between games — so indielist publishes a low, median, and high band rather than a false-precision single number, and treats free-to-play, heavily discounted, and bundle-distributed titles as having wider error margins still.
Price history
21 observed days · window low $15.99Across 21 observed UTC days from 2026-05-31 to 2026-07-24, the daily lowest tracked USD price across stores ranged from $15.99 to $19.99. The tracked-window low was $15.99 on 2026-07-15.
Real store observations · daily lowest tracked USD price across stores · missing days are not filled.
Where to buy
Affiliate disclosure- Steam reference$19.99 Buy
- Green Man Gaming
- Fanatical
- Humble Store
- GOG.com
Latest tracked store observations (2026-07-24 04:08 UTC), cheapest first. Prices may have changed since observation. Some are affiliate links — we may earn a commission at no extra cost to you. Learn more.
Platforms
windows
Frequently asked questions
- How many copies has Cepheus Protocol sold?
- indielist estimates Cepheus Protocol has sold between 143,637 and 335,153 units (median 239,395), derived from its 3,683 Steam reviews with the white-box Boxleiter v1.0 method. The full breakdown is shown on the page.
- Who developed Cepheus Protocol?
- Cepheus Protocol was developed by Halcyon Winds and published by Halcyon Winds.
- Who published Cepheus Protocol?
- Cepheus Protocol was published by Halcyon Winds, developed by Halcyon Winds. See Halcyon Winds's full catalogue and submission status on indielist.
- When was Cepheus Protocol released?
- Cepheus Protocol was released in 2020.
- How many reviews does Cepheus Protocol have on Steam?
- Cepheus Protocol has 3,683 Steam reviews, of which 76% are positive.
- Is Cepheus Protocol worth playing?
- Steam players rate Cepheus Protocol 76% positive across 3,683 reviews. indielist doesn't score games editorially; it surfaces public review sentiment and a white-box sales estimate so you can judge reception and reach yourself.
Ecosystem
Players looking for games like Cepheus Protocol can compare it on indielist against semantically similar Action titles such as The Forest, Mist Survival, Colony Survival, Kenshi, ranked by shared tags and genre rather than by ad spend. On the developer side, Halcyon Winds's other releases and Halcyon Winds's wider catalog are one click away, letting developers benchmark where Cepheus Protocol sits among a studio's body of work and how its publisher's portfolio performs. Because indielist maps studios, publishers, games, and funding into one connected graph, the same Cepheus Protocol page serves three audiences at once: players hunting their next Action game, developers studying how comparable projects were positioned and what they sold, and investors tracing which teams and labels are active in the space. A machine-readable markdown mirror of this page is published at the same path with a .md suffix for AI assistants, and its review, price, and sales-estimate figures are refreshed on a schedule rather than frozen at launch.
You might also like
Matched from shared Steam tags and primary genre. Review count breaks ties; it is not a personal recommendation score.
- T
The Forest
Action
Shared tags: Survival, Open World, Building
- M
Mist Survival
Action
Shared tags: Survival, Zombies, Open World
- C
Colony Survival
Action
Shared tags: Survival, Base-Building, Building
- K
Kenshi
Action
Shared tags: Open World, Sandbox, Survival
- Z
ZERO Sievert
Action
Shared tags: Survival, Post-apocalyptic, Action
- S
Scrap Mechanic
Action
Shared tags: Building, Sandbox, Survival
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