Version

version is a console command available in all Source games.

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Prints version info in the Developer Console.

Previous Source games (including early Source 2013 games), contains protocol version, exe version and exe build date. Newer version of Source 2013 games (except Garry's Mod) since late 2013 and 2014, aswell as Source SDK Base 2013 (both SP & MP, all versions) instead prints Client/Server version, Network PatchVersion and Protocol version.^[1]

Properties, formats, examples below.

Note:In most cases, these versions can be changed by editing the steam.inf file. This is heavily discouraged, as it immediately renders the game unable to connect to any server for its version or for any other version (due to protocol differences)

GoldSrc games

^[Todo]

Half-Life

Protocol version 48
Exe version 1.1.2.2 (valve)
Exe build: 19:06:31 Oct  7 2024 (10210)

Counter-Strike

Protocol version 48
Exe version 1.1.2.7/2.0.0.0 (cstrike)
Exe build: 16:05:41 Jun 15 2009 (4554)

Sven Co-op

Protocol version 48
Engine version 5.0.1.7 (svencoop)
Engine build: 11:20:57 Jun 12 2021 (8948)

Cry of Fear

Protocol version 48
Exe version 1.0.1.4 (cryoffear)
Exe build: 18:03:54 Apr 21 2013 (5936)

Base Defense

Protocol version 48
Exe version 1.8.1.0/Stdio (bdeff)
Exe build: 09:10:05 Jul  7 2017 (7561)

Half-Life: Caged

Protocol version 48
Exe version 1.1.2.2 (valve)
Exe build: 09:10:05 Jul  7 2017 (7561)

Absolute Zero

Protocol version 48
Exe version 1.0.1.4 (valve)
Exe build: 16:05:41 Jun 15 2009 (4554)

James Bond 007: Nightfire

Note:Updated version below based on unofficial patch.

Protocol Version 51
Engine version 5.9.9.0
Exe build: 21:57:55 Mar 16 2017 (8288)

Source games (Valve)

^[Todo]

Half-Life 2: Deathmatch

Build Label:           9371887   # Uniquely identifies each build
Network PatchVersion:  9371887   # Determines client and server compatibility
Protocol version:           24   # High level network protocol version
Server version:        9371887
Server AppID:           232370
Client version:        9371887
Client AppID:              320

Half-Life 2 (including Episodes, Half-Life 2: Lost Coast, Half-Life: Source)

Source 2013 (and later)

Build Label:           9525199   # Uniquely identifies each build
Network PatchVersion:  9525199   # Determines client and server compatibility
Protocol version:           24   # High level network protocol version

Source 2009 (or earlier, pre-SteamPipe)

Protocol version 15
Exe version 1.0.1.0 (valve)
Exe build: 13:46:47 Nov 28 2012 (5135) (220)

Team Fortress 2

Build Label:           9433646   # Uniquely identifies each build
Network PatchVersion:  9433646   # Determines client and server compatibility
Protocol version:           24   # High level network protocol version
Server version:        9433646
Server AppID:           232250
Client version:        9433646
Client AppID:              440

Left 4 Dead

Version 1.0.4.4 (left4dead)
Exe build: 18:44:09 Oct 18 2024 (9477) (500)

Left 4 Dead 2

Version 2.2.4.3 (left4dead2)
Network Version 2.1.0.0
Exe build: 14:34:57 Jan 16 2025 (9477) (550)

Portal 2

Protocol version 2001
Exe version 2.0.0.1 (portal2)
Exe build: 12:56:38 Feb  2 2024 (8928) (620)

Counter-Strike: Global Offensive

Protocol version 13881 [1575/1575]
Exe version 1.38.8.1 (csgo)
Exe build: 13:57:33 Aug 24 2023 (8802) (730)
Windows version 6.2
Steam beta name: csgo_legacy

Source games (Third-party)

Counter-Strike Online 2

Note:Can be only seen using custom launcher that allows user to enable console.

Protocol version 24
Exe version  ()
Exe build: 12:14:05 Feb  6 2018 (7031) (0)

Empires Mod

Build Label:              2564   # Uniquely identifies each build
Network PatchVersion: 2.35.1.2564   # Determines client and server compatibility
Protocol version:           24   # High level network protocol version
Server version:           2564
Server AppID:           460040
Client version:              2
Client AppID:            17740

Garry's Mod

This article or section needs to be updated to include current information regarding the subject because:

Needs update with the release of March 2025. Info below are from older versions which was temporarily added.

Remember to check for any notes left by the tagger at this article's talk page.

Protocol version 24
Exe version 2023.06.28 (garrysmod)
Exe build: 14:59:07 Oct 15 2024 (9474) (4000)
GMod version 2024.10.16, branch: x86-64, multicore: 0
Windows 64bit

No More Room in Hell

Build Label:              1132   # Uniquely identifies each build
Network PatchVersion:  1.1.3.2   # Determines client and server compatibility
Protocol version:           24   # High level network protocol version
Server version:           1132
Server AppID:           317670
Client version:              1
Client AppID:           224260

Portal Stories: Mel

Protocol version 2001
Exe version 2.0.0.1 (portal_stories)
Exe build: 11:53:30 Mar  2 2021 (8151) (317400)

Jabroni Brawl: Episode 3

Protocol version 158
Exe version 158 (jbep3)
Exe build: 20:25:22 Jul 14 2023 (1568) (869480)
Steam beta name: 

Source SDK Base

Source SDK Base 2006

Protocol version 7
Exe version 1.0.0.1 (sourcetest)
Exe build: 17:27:58 Dec  3 2009 (4044)

Source SDK Base 2007

Protocol version 14
Exe version 1.0.0.1 (sourcetest)
Exe build: 13:53:25 Feb  1 2010 (4104) (215)

Source SDK Base 2013 - Singleplayer

Build Label:           2229597   # Uniquely identifies each build
Network PatchVersion:  2229597   # Determines client and server compatibility
Protocol version:           24   # High level network protocol version

Note:Network Patch version reported as "1.0.1.0" when steam.inf is removed/renamed.

upcoming beta branch

Build Label:           2422905   # Uniquely identifies each build
Network PatchVersion:  2422905   # Determines client and server compatibility
Protocol version:           24   # High level network protocol version

Note:Network Patch version reported as "1.0.1.0" when steam.inf is removed/renamed.

Source SDK Base 2013 - Multiplayer (Legacy)

Build Label:           6630498   # Uniquely identifies each build
Network PatchVersion:  6630498   # Determines client and server compatibility
Protocol version:           24   # High level network protocol version
Server version:        6630498
Server AppID:           244310
Client version:        6630498
Client AppID:           243750

Note:previous2021 beta build. Released July 6, 2021.

Source SDK Base 2013 - Multiplayer (TF2 branch)

Build Label:           9546320   # Uniquely identifies each build
Network PatchVersion:  9546320   # Determines client and server compatibility
Protocol version:           24   # High level network protocol version
Server version:        9546320
Server AppID:           244310
Client version:        9546320
Client AppID:           243750

Note:Released February 18, 2025. Up to date as of March 29, 2025.

References

References

1. This change was present since late 2013 (but not in all Source 2013 games like Garry's Mod). The code which prints version number be only seen on both leaked full Source 2007 engine code in 2012 and full Source 2013 Multiplayer (TF2) code in 2020. Source 2007: For legal reasons, leaked code will not be provided here. But it can be found on \engine\host_cmd.cpp (line 947). Source 2013: For legal reasons, leaked code will not be provided here. But it can be found on \engine\host_cmd.cpp (line 1190)..