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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 3,599 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 model estimates its lifetime sales at roughly 140,000 to 328,000 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
3,599
Positive
76%
Steam appid
979640
Engine
n/a
Sales estimate
vv1.0140K to 328K
units (median: 234K)
≈ $1.6M to $3.7M net revenue (Steam cut + refunds + regional discount applied)
indielist estimates lifetime unit sales for Cepheus Protocol at roughly 140,000 to 328,000 copies, with a median around 234,000, derived from its 3,599 Steam reviews using a multi-factor Boxleiter model (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
90d · low $10.57Over the last 90 days the price ranged from $10.57 to $19.99, averaging $18.85 across 2 discount windows, with a historical low of $10.57 on 2026-05-18.
Synthetic series for demo. Real ITAD price history loads after Day 3 ingest.
Where to buy
Affiliate disclosure- Steam reference$19.99 Buy
- Green Man Gaming
- Fanatical
- Humble Store
- GOG.com
Live prices from public feeds, cheapest first. Some are affiliate links — we may earn a commission at no extra cost to you. Learn more.
Platforms
windows
Tags
SandboxZombiesRTSSurvivalPost-apocalypticBuildingStrategyGoreOpen WorldSingleplayerDiplomacyIndieActionTacticalEarly AccessSimulationBase-BuildingMilitaryReal Time TacticsSurvival Horror
Frequently asked questions
- How many copies has Cepheus Protocol sold?
- indielist estimates Cepheus Protocol has sold between 140,361 and 327,509 units (median 233,935), derived from its 3,599 Steam reviews with the white-box Boxleiter vv1.0 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.
- When was Cepheus Protocol released?
- Cepheus Protocol was released in 2020.
- How many reviews does Cepheus Protocol have on Steam?
- Cepheus Protocol has 3,599 Steam reviews, of which 76% are positive.
Frequently asked questions
- How many copies has Cepheus Protocol sold?
- indielist estimates Cepheus Protocol has sold between 140,361 and 327,509 units (median 233,935), derived from its 3,599 Steam reviews with the white-box Boxleiter vv1.0 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.
- When was Cepheus Protocol released?
- Cepheus Protocol was released in 2020.
- How many reviews does Cepheus Protocol have on Steam?
- Cepheus Protocol has 3,599 Steam reviews, of which 76% are positive.
Ecosystem
indielist positions Cepheus Protocol within the Action segment so players can surface comparable titles by shared tags and genre rather than by storefront promotion. 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.
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