Cepheus Protocol

All Steam Releases & Patches — Version-Specific Cheat Table Compatibility

Track every major release, minor update, patch, and hotfix for this game directly from the Steam API. Each version lets you attach precise .CT tables and clearly mark compatibility status — so users know exactly which cheat table works with their current game build.

Pre Announce Major Update

Patch Notes 2025.11.7 - public-playtest Treasure Island Now playable!

View Details Build ID: 20687408
Pre Announce Major Update

Patch Notes 2025.10.30.3 - public-playtest Treasure Island Now playable!

View Details Build ID: 20615247
Pre Announce Major Update

Patch Notes 2025.10.23.2 - public-playtest

View Details Build ID: 20514969
Pre Announce Major Update

Patch Notes 2025.10.17.2 - public-playtest

View Details Build ID: 20437799
Small Update

Patch Notes 1.3.4.16 Legacy

View Details Build ID: 20397451
Pre Announce Major Update

The Battle of Half Moon Bay | Patch Notes 2025.10.13.6 - public-playtest

View Details Build ID: 20376979
Pre Announce Major Update

Patch Notes 2025.10.11.1 - public-playtest

View Details Build ID: 20354894
Pre Announce Major Update

Patch Notes 2025.10.10.1 - public-playtest

View Details Build ID: 19849045
Small Update

Patch Notes 2025.10.9 - public-playtest

View Details Build ID: 19849045
Pre Announce Major Update

Patch Notes 2025.09.5.3 - public-playtest

View Details Build ID: 19849045
Major Update

Patch Notes + Rebuild Update: Pandemic Stress Test, Helicopters & October Goals

View Details Build ID: 20256476
Small Update

Patch Notes 1.3.4.14 Legacy

View Details Build ID: 19849045
Small Update

Patch Notes 1.3.4.13 Legacy

View Details Build ID: 19834206
Pre Announce Major Update

Patch Notes 2025.08.31 - public-playtest (formally CERC-HQ-Public)

View Details Build ID: 19805146
Small Update

Patch Notes 1.3.4.11 Legacy

View Details Build ID: 19781619
Pre Announce Major Update

Patch Notes – For Public and CERC-HQ-Public

View Details Build ID: 19713061
Small Update

Patch Notes 1.3.4.9 Legacy

View Details Build ID: 19691669
Small Update

Patch Notes – For Public and CERC-HQ-Public

View Details Build ID: 19683508
Pre Announce Major Update

Patch Notes – For Public and CERC-HQ-Public

View Details Build ID: 19665045
Major Update

The new Plan and Rebuild Progress

View Details Build ID: 19632972
Pre Announce Major Update

Patch Notes – 2025.07.21.3

View Details
Pre Announce Major Update

Patch Notes – 2025.07.19.4

View Details
Pre Announce Major Update

Patch Notes – 2025.07.05.2

View Details
Pre Announce Major Update

Patch Notes – 2025.07.02.4

View Details
Small Update

Patch Notes – 2025.07.2.4

View Details
Pre Announce Major Update

Patch - 1.3.2.7.1

View Details
Pre Announce Major Update

Patch - 1.3.2.6.8.16.15.12 Goldencrest Island is now live!

View Details
Major Update

Patch - 1.3.2.6.8.16.15.9

View Details
Pre Announce Major Update

Patch - 1.3.2.5.16.2

View Details
Pre Announce Major Update

Patch - 1.3.2.5.16.1

View Details
Pre Announce Major Update

Patch - 1.3.2.5.15

View Details
Small Update

Patch - 1.3.2.5.14

View Details
Pre Announce Major Update

Patch - 1.3.2.5.13

View Details
Pre Announce Major Update

Patch - 1.3.2.5.11

View Details Build ID: 13783944
Major Update

Patch - 1.3.2.5.10

View Details
Small Update

Patch - 1.3.2.5.6

View Details
Small Update

Patch - 1.3.2.5.2

View Details
Pre Announce Major Update

Patch - 1.3.2.5

View Details
Pre Announce Major Update

Patch - 1.3.2.4

View Details
Major Update

Guard Tower/ Turret Limits now Per Zone - 1.3.2.3

View Details
Major Update

Steam Scream "The Revenge" Patch - 1.3.2.2

View Details
Major Update

Patch - 1.3.1.7

View Details
Pre Announce Major Update

Patch - 1.2.7.17.9.3

View Details
Pre Announce Major Update

Patch - 1.2.7.17.9.2

View Details
Pre Announce Major Update

Patch - 1.2.7.17.9

View Details
Pre Announce Major Update

Patch - 1.2.7.17.6

View Details
Pre Announce Major Update

Patch - 1.2.7.17.5

View Details
Small Update

Patch - 1.2.7.17.4 Hotfix #1

View Details
Pre Announce Major Update

Patch - 1.2.7.17.4

View Details
Pre Announce Major Update

Patch - 1.2.7.16

View Details
Small Update

Patch - 1.2.7.15.1

View Details
Major Update

Patch - 1.2.7.15

View Details
Pre Announce Major Update

Patch - 1.2.7.12 Dynamic Civilian Groups (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.7.11 Dynamic Civilian Groups (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.7.10 Dynamic Civilian Groups (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.7.9 Dynamic Civilian Groups (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.7.8 Dynamic Civilian Groups (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.7.7 Dynamic Civilian Groups (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.7.6 Dynamic Civilian Groups (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.7.5 Dynamic Civilian Groups (Experimental Only)

View Details
Small Update

Patch - 1.2.7.4 Dynamic Civilian Groups (Experimental Only)

View Details
Small Update

Patch - 1.2.7.3.1 Dynamic Civilian Groups Hotfix (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.7.3 Dynamic Civilian Groups (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.7.2 Dynamic Civilian Groups (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.7.1 Dynamic Civilian Groups (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.7 Dynamic Civilian Groups (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.6.4 (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.6.3 (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.6.2 (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.6.1 (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.6 (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.5.1 (Experimental Only)

View Details
Pre Announce Major Update

Patch - 1.2.5 (All branches)

View Details
Pre Announce Major Update

Patch - 1.2.4.1 Preview (Experimental branch)

View Details
Pre Announce Major Update

Patch - 1.2.4 Preview (Experimental branch)

View Details
Pre Announce Major Update

Patch - 1.2.3 Preview (Experimental branch)

View Details
Pre Announce Major Update

Patch - 1.2.2 Preview (Experimental branch)

View Details
Pre Announce Major Update

Patch - 1.2.1 Preview (Experimental branch)

View Details
Pre Announce Major Update

Patch - 1.2 Preview (Experimental branch)

View Details
Pre Announce Major Update

Patch - 1.1.18.4 Bug Fixes and QOL changes

View Details
Pre Announce Major Update

Patch - 1.1.18.2

View Details
Pre Announce Major Update

Patch - 1.1.18.1

View Details
Pre Announce Major Update

Patch - 1.1.17.6 [ New Early Game Experimental only]

View Details
Pre Announce Major Update

Patch - 1.1.17.5 [ New Early Game Experimental only]

View Details
Pre Announce Major Update

Patch - 1.1.17.4 [ New Early Game Experimental only]

View Details
Pre Announce Major Update

Patch - 1.1.17.3 [ New Early Game Experimental only]

View Details
Pre Announce Major Update

Patch - 1.1.17.2 [ New Early Game Experimental only]

View Details
Pre Announce Major Update

Patch - 1.1.17.1 [ New Early Game Experimental only]

View Details
Pre Announce Major Update

Patch - 1.1.17 [ New Early Game Experimental only]

View Details
Pre Announce Major Update

Patch - 1.1.16.1 [Experimental only]

View Details
Pre Announce Major Update

Patch - 1.1.15.1

View Details
Pre Announce Major Update

Patch - 1.1.15

View Details
Pre Announce Major Update

Patch - 1.1.14.4 [Experimental only]

View Details
Pre Announce Major Update

Patch - 1.1.14.2 [Experimental only]

View Details
Pre Announce Major Update

Patch - 1.1.14 [Experimental only]

View Details
Pre Announce Major Update

Patch - 1.1.13 [Experimental only]

View Details
Pre Announce Major Update

Patch - 1.1.12 [Experimental only]

View Details
Pre Announce Major Update

Patch - 1.1.11 [Experimental only]

View Details
Small Update

Patch - 1.1.10.1

View Details
Small Update

Patch - 1.1.10

View Details

Initial Release