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Cepheus Protocol

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App ID 979640
App Type Game
Developer
Publisher Halcyon Winds
Franchise Cepheus Protocol
Supported Systems Windows
Technologies Unreal Engine, EpicOnlineServices SDK
Last Changenumber 31109063
Last Record Update 15 September 2025 – 03:18:21 UTC ()
Release Date 15 May 2020 – 07:47:00 UTC ()
😏 75.60%
3k reviews
17
In-Game
+12
🧱 Sandbox 🧟 Zombies 🌐 RTS 🌲 Survival ☢️ Post-apocalyptic

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.

Steam price history

Current Price $19.99
Lowest Recorded Price $9.89 at -34% 29 October 2020
Currency Current Price Converted Price Lowest Recorded Price
U.S. Dollar $19.99 $19.99 $9.89 $9.89 at -34%
South Asia - USD $8.19 $8.19 -59.03% $4.61 $4.61 at -34%
Russian Ruble 710 ₽ $8.55 -57.21% $2.85 237 ₽ at -34%
Kazakhstani Tenge 5200₸ $9.62 -51.85% $2.93 1584₸ at -34%
Vietnamese Dong 260000₫ $9.85 -50.70% $4.13 109000₫ at -34%
Indian Rupee ₹ 880 $9.98 -50.06% $3.42 ₹ 302 at -34%
Ukrainian Hryvnia 415₴ $10.07 -49.60% $3.66 151₴ at -34%
Indonesian Rupiah Rp 165999 $10.13 -49.30% $3.86 Rp 63359 at -34%
CIS - U.S. Dollar $10.49 $10.49 -47.52% $5.60 $5.60 at -34%
LATAM - U.S. Dollar $10.49 $10.49 -47.52% $8.39 $8.39 at -20%
MENA - U.S. Dollar $10.49 $10.49 -47.52% $8.39 $8.39 at -20%
South African Rand R 185.00 $10.65 -46.70% $3.99 R 69.30 at -34%
Chinese Yuan ¥ 76 $10.67 -46.59% $4.63 ¥ 33 at -34%
Philippine Peso ₱615.00 $10.76 -46.15% $4.50 ₱257.36 at -34%
Taiwan Dollar NT$ 328 $10.88 -45.54% $5.84 NT$ 176 at -34%
Saudi Riyal 40.95 SR $10.91 -45.39% $5.26 19.76 SR at -34%
Kuwaiti Dinar 3.35 KD $10.97 -45.09% $6.02 1.84 KD at -34%
Chilean Peso CLP$ 10500 $11.03 -44.80% $4.43 CLP$ 4224 at -34%
Brazilian Real R$ 59,99 $11.28 -43.56% $3.59 R$ 19,13 at -34%
Malaysian Ringgit RM49.00 $11.64 -41.73% $5.02 RM21.12 at -34%
Qatari Riyal 43.99 QR $12.07 -39.60% $6.15 22.43 QR at -34%
Colombian Peso COL$ 47500 $12.20 -38.93% $4.24 COL$ 16500 at -34%
Peruvian Sol S/.43.00 $12.31 -38.40% $5.85 S/.20.46 at -34%
Mexican Peso Mex$ 227.99 $12.41 -37.87% $5.57 Mex$ 102.29 at -34%
Thai Baht ฿400.00 $12.57 -37.07% $4.96 ฿157.74 at -34%
U.A.E. Dirham 53.00 AED $14.43 -27.81% $7.54 27.72 AED at -34%
Singapore Dollar S$18.50 $14.45 -27.71% $7.47 S$9.57 at -34%
Uruguayan Peso $U595 $14.81 -25.90% $5.40 $U217 at -34%
South Korean Won ₩ 21500 $15.53 -22.28% $7.39 ₩ 10230 at -34%
Japanese Yen ¥ 2300 $15.60 -21.92% $6.80 ¥ 1003 at -34%
Hong Kong Dollar HK$ 125.00 $16.06 -19.62% $6.44 HK$ 50.16 at -34%
Costa Rican Colon ₡8500 $16.88 -15.55% $8.51 ₡4290 at -34%
New Zealand Dollar NZ$ 28.99 $17.28 -13.52% $7.27 NZ$ 12.20 at -34%
Canadian Dollar CDN$ 25.99 $18.87 -5.60% $8.37 CDN$ 11.54 at -34%
Australian Dollar A$ 29.50 $19.67 -1.57% $9.46 A$ 14.19 at -34%
Israeli New Shekel ₪73.95 $22.07 +10.41% $11.01 ₪36.92 at -34%
Norwegian Krone 220,00 kr $22.38 +12.01% $6.91 67,98 kr at -34%
British Pound £16.75 $22.78 +13.98% $10.21 £7.51 at -34%
Euro 19,50€ $22.94 +14.79% $9.69 8,24€ at -34%
Polish Zloty 91,99zł $25.48 +27.51% $9.87 35,63zł at -34%
Swiss Franc CHF 21.99 $27.68 +38.48% $12.87 CHF 10.23 at -34%
Valve suggested prices are shown on package pages.

Price history

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Click on a currency name to load price history for that particular currency.
View lowest recorded prices on Steam store pages by using our browser extension.

Additional Information

Developer Halcyon Winds
controller_support partial
community_visible_stats Yes
workshop_visible Yes
DLCAvailableOnStore Yes
ReleaseState released
Publisher Halcyon Winds
eulas
0 ↴
id979640_eula_0
nameCepheus Protocol EULA
urlhttps://store.steampowered.com//eula/979640_eula_0
version6
Store Release Date 15 May 2020 – 07:47:36 UTC ()
osarch 64
community_hub_visible Yes
AbsoluteMouseCoordinates Yes
Social Media https://discord.gg/hYzMx3JgDN
https://www.facebook.com/CepheusProtocol/
https://www.twitch.tv/halcyonwinds
https://x.com/CepheusProtocol
https://www.youtube.com/channel/UC0eBJIGecAjqbAcJk3IajoQ/
Primary Genre Strategy (2)
Store Genres Action (1), Adventure (25), Indie (23), Simulation (28), Strategy (2), Early Access (70)
Steam Release Date 15 May 2020 – 07:47:00 UTC ()
Store Asset Modification Time 28 June 2025 – 17:04:15 UTC () (1751130255)
library_assets
library_capsuleen
library_heroen
library_logoen
logo_position ↴
pinned_positionBottomLeft
width_pct100
height_pct37.887382340973815
osextended empty string
review_score 6
review_percentage 78
RemotePlayTogetherTestingBranches default
Detected Technologies (?) Unreal Engine, EpicOnlineServices SDK, Intel_OID SDK, Intel_oneTBB SDK, NVIDIA_Nsight_Aftermath SDK, Ogg SDK, Vorbis SDK, XAudio2 SDK
Steam Deck Compatibility
  • Steam Deck:
  • Some functionality is not accessible when using the default controller configuration, requiring use of the touchscreen or virtual keyboard, or a community configuration
  • This game sometimes shows mouse, keyboard, or non-Steam-Deck controller icons
  • Entering some text requires manually invoking the on-screen keyboard
  • Some in-game text is small and may be difficult to read
  • This game requires manual configuration of graphics settings to perform well on Steam Deck
  •  
  • SteamOS:
  • This game runs successfully on SteamOS
  • Note: Entering some text requires manually invoking the on-screen keyboard
  • Note: Some functionality is not accessible when using the default controller configuration, requiring use of the touchscreen or virtual keyboard, or a community configuration
  •  
  • category: Playable
  • steamos_compatibility: Compatible
  • test_timestamp: 25 May 2023 – 00:00:00 UTC
  • tested_build_id: 11270075
  • configuration:
    supported_inputgamepad
    requires_manual_keyboard_invoke1
    requires_non_controller_launcher_nav0
    primary_player_is_controller_slot_00
    non_deck_display_glyphs1
    small_text1
    requires_internet_for_setup0
    requires_internet_for_singleplayer0
    recommended_runtimeproton-8.0-2
    requires_h2640
    requires_voice_files0
    gamescope_frame_limiter_not_supported0
    hdr_support0
Content Descriptors Frequent Violence or Gore (2), General Mature Content (5)
controllertagwizard Yes
Early Access Release Date 15 May 2020 – 00:00:00 UTC ()
First seen on SteamDB 8 November 2018 – 08:23:52 UTC (), in changelist #5354722
Content Descriptors (Including DLC) Frequent Violence or Gore (2), General Mature Content (5)

Supported Languages

9 Languages Interface Full Audio Subtitles
English Yes Yes
Simplified Chinese Yes
Korean Yes
German Yes
Japanese Yes
Russian Yes
Spanish - Spain Yes
Portuguese - Portugal Yes
French Yes

Assets

Load all asset images
clienticon 37c2f3cbfd4b44cfa88c7815fb4902ebb5d569e2
clienttga 28cbff32772d43a0232e23db730c6c2785b484bc
icon 9b2731c597997e70f9e4bcfcba17829218cf3fa7
logo 442574f6127ef08518c4c25f0c1ad131b9d821f2
logo_small 442574f6127ef08518c4c25f0c1ad131b9d821f2_thumb
small_capsule
englishcapsule_231x87.jpg
header_image
englishheader.jpg
library_assets_full
library_capsule ↴
image/englishlibrary_600x900.jpg
library_hero ↴
image/englishlibrary_hero.jpg
library_logo ↴
logo_position/pinned_positionBottomLeft
logo_position/width_pct100
logo_position/height_pct37.887382340973815
image/englishlogo.png
Assets
main_capsulecapsule_616x353.jpg
small_capsulecapsule_231x87.jpg
headerheader.jpg
page_backgroundpage_bg_generated_v6b.jpg
hero_capsulehero_capsule.jpg
library_capsulelibrary_600x900.jpg
library_herolibrary_hero.jpg
community_icon9b2731c597997e70f9e4bcfcba17829218cf3fa7.jpg
page_background_pathapp/979640
raw_page_backgroundpage_bg_raw.jpg
timestamp28 June 2025 – 17:05:06 UTC
Trailers
256822296 ↴
trailer_nameCepheus Protocol Exodus Trailer
trailer_category1
trailer_480p/video/webm256822296/movie480_vp9.webm
trailer_480p/video/mp4256822296/movie480.mp4
trailer_max/video/webm256822296/movie_max_vp9.webm
trailer_max/video/mp4256822296/movie_max.mp4
microtrailer/video/webm979640/347595/c1803967073994f1cd72de53852478743b52bc40/1751171611/microtrailer.webm
microtrailer/video/mp4979640/347595/c1803967073994f1cd72de53852478743b52bc40/1751171611/microtrailer.mp4
screenshot_medium256822296/movie.293x165.jpg
screenshot_full256822296/movie_full.jpg
trailer_base_id347595
all_agestrue
is_highlighttrue
timestamp1718390752
256918749 ↴
trailer_nameCepheus Protocol Uprising Trailer
trailer_category1
trailer_480p/video/webm256918749/movie480_vp9.webm
trailer_480p/video/mp4256918749/movie480.mp4
trailer_max/video/webm256918749/movie_max_vp9.webm
trailer_max/video/mp4256918749/movie_max.mp4
microtrailer/video/webm979640/518246/3ca0674260b2a2cee0ae49284f6173c3dd7b8597/1751171612/microtrailer.webm
microtrailer/video/mp4979640/518246/3ca0674260b2a2cee0ae49284f6173c3dd7b8597/1751171612/microtrailer.mp4
screenshot_medium256918749/movie.293x165.jpg
screenshot_full256918749/movie_full.jpg
trailer_base_id518246
all_agestrue
timestamp1718390757
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