Source/Engine versions
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List of 
Source engine versions and build numbers.
| Build (exe) | Build (PatchVersion) | Game | Branch | Protocol version | Build date | Notes |
|---|---|---|---|---|---|---|
| -7 | Half-Life: Source, Counter-Strike: Source | Source 2004 | Protocol Version 2 | Sep 23 2003 | ||
| -4 | Half-Life 2 | Source 2004 | Protocol Version 2 | Sep 26 2003 | ||
| 2106 | Counter-Strike: Source | Source 2004 | Protocol Version 3 | Aug 13 2004 | ||
| 2153 | Half-Life: Source, Half-Life 2, Counter-Strike: Source | Source 2004 | Protocol Version 5 | Sep 29 2004 | ||
| 2187 | Half-Life 2, Counter-Strike: Source | Source 2004 | Protocol Version 6 | Nov 4 2004 | ||
| 2213 | Half-Life 2: Deathmatch | Source 2004 | Protocol Version 7 | Dec 1 2004 | ||
| 2215 | Half-Life 2, Half-Life 2: Deathmatch, Counter-Strike: Source | Source 2004 | Protocol Version 7 | Nov 30 2004 | ||
| 2217 | Half-Life: Source, Half-Life 2, Counter-Strike: Source, Half-Life 2: Deathmatch | Source 2004 | Protocol Version 7 | Dec 2 2004 | ||
| 2229 | Half-Life 2 | Source 2004 | Protocol Version 7 | Dec 15 2004 | ||
| 2230 | Counter-Strike: Source | Source 2004 | Protocol Version 7 | Dec 15 2004 | ||
| 2259 | Counter-Strike: Source | Source 2004 | Protocol Version 7 | Jan 30 2005 | ||
| 2279 | Counter-Strike: Source | Source 2004 | Protocol Version 7 | Feb 16 2005 | ||
| 2293 | Counter-Strike: Source | Source 2004 | Protocol Version 7 | Feb 21 2005 | ||
| 2301 | Counter-Strike: Source | Source 2004 | Protocol Version 7 | Feb 27 2005 | ||
| 2342 | Half-Life 2 | Source 2004 | Protocol Version 7 | Mar 24 2003 | ||
| 2345 | Half-Life 2 | Source 2004 | Protocol Version 7 | Mar 27 2003 | ||
| 2364 | Half-Life 2 | Source 2004 | Protocol Version 7 | Apr 15 2003 | ||
| 2371 | Half-Life 2 | Source 2004 | Protocol Version 7 | Apr 22 2003 | ||
| 2378 | Half-Life 2 | Source 2004 | Protocol Version 7 | Apr 29 2003 | ||
| 2379 | Half-Life 2 | Source 2004 | Protocol Version 7 | Apr 30 2003 | ||
| 2390 | Half-Life 2 | Source 2004 | Protocol Version 7 | May 11 2003 | ||
| 2433 | Counter-Strike: Source | Source 2004 | Protocol Version 7 | Jul 6 2005 | ||
| 2455 | Half-Life: Source, Half-Life 2, Counter-Strike: Source, Half-Life 2: Deathmatch | Source 2004 | Protocol Version 7 | Jul 28 2005 | ||
| 2459 | Half-Life: Source, Half-Life 2, Counter-Strike: Source, Half-Life 2: Deathmatch | Source 2004 | Protocol Version 7 | Aug 1 2005 | ||
| 2495 | Half-Life: Source | Source 2004 | Protocol Version 7 | Sep 5 2005 | ||
| 2496 | Half-Life: Source | Source 2004 | Protocol Version 7 | Sep 6 2005 | ||
| 2497 | Half-Life 2, Counter-Strike: Source, Half-Life 2: Deathmatch, Day of Defeat: Source | Source 2004 | Protocol Version 7 | Sep 8 2005 | ||
| 2547 | Half-Life 2, Half-Life 2: Lost Coast | Source 2004 | Protocol Version 7 | Oct 28 2005 | ||
| 2578 | Half-Life 2, Counter-Strike: Source | Source 2004 | Protocol Version 7 | Nov 28 2005 | ||
| 2596 | Half-Life: Source, Half-Life 2, Counter-Strike: Source | Source 2004 | Protocol Version 7 | Dec 16 2005 | ||
| 2601 | Half-Life 2 | Source 2004 | Protocol Version 7 | Dec 2 2005 | ||
| 2707 | Half-Life: Source, Half-Life 2, Half-Life 2: Lost Coast, Half-Life 2: Deathmatch, Counter-Strike: Source, Day of Defeat: Source | Source 2004 | Protocol Version 7 | Apr 6 2006 | ||
| 2733 | Half-Life 2: Episode One, Counter-Strike: Source | Source 2006 | Protocol Version 7 | May 2 2006 | ||
| 2737 | Half-Life: Source, Half-Life 2 | Source 2006 | Protocol Version 7 | May 6 2006 | ||
| 2761 | Half-Life 2, Half-Life: Source, Half-Life 2: Episode One | Source 2006 | Protocol Version 7 | May 30 2006 | ||
| 2894 | Counter-Strike: Source | Source 2006 | Protocol Version 7 | Oct 10 2006 | ||
| 2915 | Source Particle Benchmark | Source 2006 | Protocol Version 7 | Oct 31 2006 | ||
| 2940 | Dark Messiah of Might & Magic Single Player | Source 2006 | Protocol Version 7 | Nov 28 2006 | ||
| 2949 | Half-Life 2: Episode One, Counter-Strike: Source, Garry's Mod | Source 2006 | Protocol Version 7 | Dec 6 2006 | ||
| 2959 | Half-Life 2: Episode One | Source 2006 | Protocol Version 7 | Dec 16 2006 | ||
| 2992 | Half-Life Deathmatch: Source | Source 2006 | Protocol Version 7 | Jan 16 2007 | ||
| 3048 | Counter-Strike: Source | Source 2006 | Protocol Version 7 | Jul 7 2007 | ||
| 3152 | Half-Life Deathmatch: Source, Counter-Strike: Source | Source 2006 | Protocol Version 7 | Jun 25 2007 | ||
| 3181 | Counter-Strike: Source | Source 2006 | Protocol Version 7 | Jul 24 2007 | ||
| 3198 | Half-Life 2: Episode Two(Postal 3) | Source 2007 Beta | Protocol Version 7 | Aug 10 2007 | ||
| 3219 | Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two, Portal, Team Fortress 2 (Xbox 360) | Source 2007 | Protocol Version 8 | |||
| 3224 | Half-Life: Source, Half-Life 2, Half-Life 2: Episode One, Counter-Strike: Source | Source 2006 | Protocol Version 7 | Sep 5 2007 | ||
| 3236 | Team Fortress 2 (PC) | Source 2007 Beta | Protocol Version 8 | |||
| 3239 | Team Fortress 2 | Source 2007 Beta | ? | Sep 20 2007 | ||
| 3258 | Half-Life 2: Episode Two, Portal | Source 2007 | Protocol Version 11 | Oct 9 2007 | ||
| 3264 | Half-Life: Source, Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Deathmatch, Counter-Strike: Source | Source 2006 | Protocol Version 7 | Oct 15 2007 | ||
| 3285 | Portal | Source 2007 | Protocol Version 14 | Oct 10 2007 | ||
| 3300 | Half-Life 2: Episode Two, Portal | Source 2007 | Protocol Version 14 | Nov 20 2007 | ||
| 3338 | Half-Life 2: Episode Two | Source 2007 | Protocol Version 14 | Dec 28 2007 | ||
| 3343 | Team Fortress 2 | Source 2007 | Protocol Version 14 | Jan 2 2008 | ||
| 3366 | Team Fortress 2 | Source 2007 | Protocol Version 14 | Jan 25 2008 | ||
| 3412 | Half-Life 2: Episode Two | Source 2007 | Protocol Version 14 | Mar 11 2008 | ||
| 3420 | Portal, Team Fortress 2, Half-Life 2: Episode Two | Source 2007 | Protocol Version 14 | Mar 19 2008 | ||
| 3429 | Half-Life 2: Episode Two | Source 2007 | Protocol Version 14 | Mar 28 2008 | ||
| 3432 | Team Fortress 2 | Source 2007 | Protocol Version 14 | Mar 31 2008 | ||
| 3467 | Half-Life 2: Episode Two, Team Fortress 2 | Source 2007 | Protocol Version 14 | May 6 2008 | ||
| 3530 | Portal, Half-Life 2: Episode Two, Source SDK Base 2007, Day of Defeat: Source, Garry's Mod, Team Fortress 2, Team Fortress 2 Dedicated Server | Source 2007 | Protocol Version 14 | Jul 8 2008 | ||
| 3531 | Half-Life 2, Half-Life 2: Episode One, Counter-Strike: Source, Half-Life 2: Deathmatch, Half-Life Deathmatch: Source, Source SDK Base 2006, Source Dedicated Server | Source 2006 | Protocol Version 7 | Jul 8 2008 | ||
| 3539 | Team Fortress 2 | Source 2007 | Protocol Version 14 | Jul 16 2008 | ||
| 3575 | Half-Life 2: Episode Two, Day of Defeat: Source, Zombie Panic: Source, Team Fortress 2, Garry's Mod | Source 2007 | Protocol Version 14 | Aug 21 2008 | ||
| 3663 | Left 4 Dead | Left 4 Dead engine branch | Protocol Version 37 (Release Build) | Nov 17 2008 | ||
| 3666 | Left 4 Dead | Left 4 Dead engine branch | ? | Nov 20 2008 | ||
| 3681 | Left 4 Dead | Left 4 Dead engine branch | ? | Dec 5 2008 | ||
| 3693 | Half-Life 2: Episode One | Source 2006 | Protocol Version 7 | Dec 17 2008 | ||
| 3698 | Counter-Strike: Source | Source 2006 | Protocol Version 7 | Dec 21 2008 | ||
| 3716 | Left 4 Dead | Left 4 Dead engine branch | ? | Jan 9 2009 | ||
| 3730 | Left 4 Dead, Left 4 Dead 2 | Left 4 Dead engine branch | Protocol Version 38(L4D2) | Jan 23 2009 | ||
| 3740 | Team Fortress 2, Portal | Source 2007 | Protocol Version 14 | Feb 2 2009 | ||
| 3755 | Team Fortress 2 | Source 2007 | Protocol Version 14 | Feb 17 2009 | ||
| 3790 | Left 4 Dead | Left 4 Dead engine branch | ? | Apr 11 2009 | ||
| 3791 | Half-Life 2: Episode Two, Portal | Source 2007 | Protocol Version 14 | Mar 25 2009 | ||
| 3846 | Half-Life 2: Episode One, Counter-Strike: Source | Source 2006 | Protocol Version 7 | May 19 2009 | ||
| 3847 | Team Fortress 2 | Source 2006 | Protocol Version 14 | May 20 2009 | ||
| 3861 | Day of Defeat: Source | Source 2009 | Protocol Version 15 | Jun 3 2009 | ||
| 3881 | Left 4 Dead | Left 4 Dead engine branch | Protocol Version 1014 | Jun 23 2009 | ||
| 3887 | Left 4 Dead | Left 4 Dead engine branch | Protocol Version 1014 | Jun 30 2009 | ||
| 3908 | Left 4 Dead | Left 4 Dead engine branch | Protocol Version 1014 | Jul 20 2009 | ||
| 3939 | Left 4 Dead | Left 4 Dead engine branch | ? | Aug 20 2009 | ||
| 3943 | Half-Life 2: Episode Two, Day of Defeat: Source, Synergy, Portal(+Prelude), Zombie Panic: Source, D.I.P.R.I.P. Warm Up, Garry's Mod, Smashball, Age of Chivalry | Source 2007 | Protocol Version 14 | Sep 2 2009 | ||
| 3945 | Half-Life: Source, Half-Life 2, Half-Life 2: Episode One, Counter-Strike: Source, Dystopia, Half-Life Deathmatch: Source, Half-Life 2: Deathmatch, Eternal Silence, Half-Life 2: Capture the Flag, Garry's Mod | Source 2006 | Protocol Version 7 | Aug 26 2009 | ||
| 3971 | Team Fortress 2 | Source 2009 | Protocol Version 15 | Sep 21 2009 | ||
| 4010 | Left 4 Dead 2 | ? | Nov 4 2009 | |||
| 4013 | Day of Defeat: Source, Team Fortress 2 | Source 2009 | Protocol Version 15 | Nov 2 2009 | ||
| 4044 | Source SDK Base 2006, Counter-Strike: Source | Source 2006 | Protocol Version 7 | Dec 3 2009 | Last Old Engine build, CS:S 4044 is CS:S v34, last SDK Base 2006 version | |
| 4097 | Team Fortress 2 | Source 2009 | Protocol Version 15 | Jan 25 2010 | ||
| 4100 | ? | Protocol Version 7 | Jan 28 2010 | |||
| 4104 | Half-Life 2: Episode Two, Source SDK Base 2007 | Source 2007 | Protocol Version 14 | Feb 1 2010 | Last Source 2007 build, last SDK Base 2007 version, Black Mesa mod runs on this version. | |
| 4106 | Left 4 Dead 2 | Left 4 Dead engine branch | Protocol Version 14 (may be incorrect) | Feb 3 2010 | ||
| 4121 | Left 4 Dead 2 | Left 4 Dead engine branch | ? | Mar 28 2010 | ||
| 4190 | Team Fortress 2 | Source 2009 | Protocol Version 15 | Apr 28 2010 | ||
| 4197 | Counter-Strike: Source | Source 2009 | Protocol Version 15 | May 5 2010 | CS:S New Engine Beta (co-developed by Hidden Path Entertainment) | |
| 4209 | Counter-Strike: Source | Source 2009 | Protocol Version 15 | May 17 2010 | ||
| 4218 (Supposed) | Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two | Source 2009 | Protocol Version 15 | May 26 2010 | New Engine - Mac OS X | |
| 4231 | Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two, Counter-Strike: Source | Source 2009 | Protocol Version 15 | Jun 10 2010 | New Engine - Windows, first CS:S New Engine version publicly released. | |
| 4260 | Counter-Strike: Source | Source 2009 | Protocol Version 15 | Jul 7 2010 | ||
| 4276 | Counter-Strike: Source | Source 2009 | Protocol Version 15 | Jul 23 2010 | ||
| 4295 | Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two, Garry's Mod, Portal(+Prelude) | Source 2009 | Protocol Version 15 | Aug 11 2010 | ||
| 4296 | Half-Life 2 | Source 2009 | Protocol Version 15 | Aug 12 2010 | ||
| 4307 | Counter-Strike: Source | Source 2009 | Protocol Version 15 | Aug 24 2010 | ||
| 4325 | Counter-Strike: Source | Source 2009 | Protocol Version 15 | Sep 10 2010 | ||
| 4349 | Counter-Strike: Source | Source 2009 | Protocol Version 15 | Oct 4 2010 | ||
| 4364 | Left 4 Dead | Left 4 Dead engine branch | ? | Jan 6 2010 | ||
| 4394 | Counter-Strike: Source | Source 2009 | Protocol Version 15 | Nov 18 2010 | ||
| 4421 | Counter-Strike: Source | Source 2009 | Protocol Version 15 | Dec 15 2010 | ||
| 4426 | Counter-Strike: Source, Half-Life 2: Deathmatch, Day of Defeat: Source | Source 2009 | Protocol Version 15 | Feb 21 2011, Dec 20 2010 (HL2:DM and DoD:S) | ||
| 4440 | Left 4 Dead | Left 4 Dead engine branch | ? | Mar 4 2011 | ||
| 4539 | Counter-Strike: Source, Half-Life 2: Deathmatch | Source 2009 | Protocol Version 15 | Apr 12 2011 | ||
| 4554 | Portal 2 | Portal 2 engine branch | Protocol Version 2001 | Apr 27 2011 | ||
| 4560 | Portal 2 | Portal 2 engine branch | Protocol Version 2001 | May 3 2011 | ||
| 4569 | Day of Defeat: Source, Counter-Strike: Source | Source 2009 or Source Multiplayer Beta? | Protocol Version 16 | May 12 2011 | ||
| 4574 | Counter-Strike: Source | Source 2009 or Source Multiplayer Beta? | Protocol Version 16 | May 17 2011 | ||
| 4596 | Team Fortress 2 | Source 2007 | Protocol Version 14 | Jun 8 2011 | made specifically for viewing old demos? 2007 branch hasn't been updated since 2010 | |
| 4604 | Team Fortress 2 | Source 2009 or Source Multiplayer Beta? | Protocol Version 16 | Jun 15 2011 | ||
| 4608 | Counter-Strike: Source | Source 2009 or Source Multiplayer Beta? | Protocol Version 17 | Jun 27 2011 | ||
| 4617 | Garry's Mod | Source 2009 or Source Multiplayer Beta? | Protocol Version 17 | Jun 30 2011 | ||
| 4624 | Counter-Strike: Source | Source 2009 or Source Multiplayer Beta? | Protocol Version 17 | Jul 6 2011 | ||
| 4644 | Half-Life 2: Deathmatch, Counter-Strike: Source | Source 2009 or Source Multiplayer Beta? | Protocol Version 17 | Jul 30 2011 | ||
| 4657 | Counter-Strike: Global Offensive | CS:GO engine branch (Beta) | Protocol Version 10040 | Aug 8 2011 | ||
| 4667 | Counter-Strike: Source | Source 2009 or Source Multiplayer Beta? | Protocol Version 17 | Aug 30 2011 | ||
| 4687 | Counter-Strike: Source | Source 2009 or Source Multiplayer Beta? | Protocol Version 18 | Sep 14 2011 | ||
| 4706 | Portal 2 | Portal 2 engine branch | Protocol Version 2001 | Sep 26 2011 | ||
| 4710 | Portal 2 | Portal 2 engine branch | Protocol Version 2001 | Oct 6 2011 | ||
| 4716 | Left 4 Dead | Left 4 Dead engine branch | ? | |||
| 4727 | Counter-Strike: Source | Source Multiplayer | Protocol Version 18 | Oct 19 2011 | Source SDK Update | |
| 4743 | Counter-Strike: Source | Source Multiplayer | Protocol Version 19 | Nov 2 2011 | ||
| 4769 | Team Fortress 2 | Source Multiplayer | Protocol Version 21 | Nov 28 2011 | ||
| 4773 | Counter-Strike: Global Offensive | CS:GO engine branch (Beta) | Protocol Version 10045 | Dec 2 2011 | ||
| 4785 | Counter-Strike: Source | Source Multiplayer | Protocol Version 21 | Dec 14 2011 | ||
| 4833 | Counter-Strike: Source | Source Multiplayer | Protocol Version 21 | Jan 31 2012 | ||
| 4871 | Counter-Strike: Global Offensive | CS:GO engine branch (Beta) | Protocol Version 10058 | Mar 9 2012 | ||
| 4882 | Counter-Strike: Global Offensive | CS:GO engine branch (Beta) | Protocol Version 10062 | Mar 20 2012 | ||
| 4885 | Team Fortress 2 | Source Multiplayer | Protocol Version 21 | Mar 23 2012 | ||
| 4890 | Counter-Strike: Global Offensive | CS:GO engine branch (Beta) | Protocol Version 10063 | Mar 28 2012 | ||
| 4890 | Counter-Strike: Global Offensive | CS:GO engine branch (Beta) | Protocol Version 10064 | Mar 30 2012 | ||
| 4909 | Half-Life 2: Deathmatch, Team Fortress 2 | Source Multiplayer | Protocol Version 21 | Apr 16 2012 | ||
| 4904 | Counter-Strike: Global Offensive | CS:GO engine branch (Beta) | Protocol Version 11003 | Apr 11 2012 | ||
| 4910 | Counter-Strike: Global Offensive | CS:GO engine branch (Beta) | Protocol Version 11101 | Apr 17 2012 | ||
| 4920 | Counter-Strike: Global Offensive | CS:GO engine branch (Beta) | Protocol Version 11202 | Apr 27 2012 | ||
| 4924 | Portal 2, Counter-Strike: Global Offensive | Portal 2 engine branch CS:GO engine branch (Beta) |
Protocol Version 2001, Protocol Version 11307(CS:GO) | May 1 2012 | ||
| 4934 | Counter-Strike: Source, Half-Life 2: Deathmatch | Source Multiplayer | Protocol Version 21 | May 11 2012 | ||
| 4939 | Counter-Strike: Global Offensive | CS:GO engine branch (Beta) | Protocol Version 11504 or Protocol Version 11511 | May 16 2012 | ||
| 4941 | Portal 2 | Portal 2 engine branch | Protocol Version 2001 | May 31 2012 | ||
| 4961 | Day of Defeat: Source, Team Fortress 2 | Source Multiplayer | Protocol Version 21 | Jun 7 2012 | ||
| 4981 | Counter-Strike: Source | Source Multiplayer | Protocol Version 22 | Jun 27 2012 | ||
| 4993 | Team Fortress 2 | Source Multiplayer | Protocol Version 22 | Jul 9 2012 | ||
| 5028 | Counter-Strike: Source, Team Fortress 2 | Source Multiplayer | Protocol Version 22 | Aug 20 2012 | ||
| 5042 | Portal 2 | Portal 2 engine branch | Protocol Version 2001 | Aug 27 2012 | ||
| 5051 | Day of Defeat: Source, Team Fortress 2 | Source Multiplayer | Protocol Version 22 | Sep 5 2012 | ||
| 5072 | Team Fortress 2 | Source Multiplayer | Protocol Version 22 | Sep 26 2012 | ||
| 5126 | Team Fortress 2 | Source Multiplayer | Protocol Version 22 | Nov 19 2012 | ||
| 5198 | Counter-Strike: Source | Source Multiplayer | Protocol Version 23 | Jan 30 2013 | ||
| 5134 | Left 4 Dead | Left 4 Dead engine branch | ? | Nov 27 2012 | ||
| 5135 | Half-Life 2, Portal, Half-Life 2: Episode One, Half-Life 2: Episode Two | Source 2009 | Protocol Version 15 | Nov 28 2012 | Last version before Steampipe. Airboat stops on every map load. Early Dark Energy glitch. Source Unpack (HL2 and Portal) | |
| 5153 | Half-Life 2: Deathmatch, Team Fortress 2 | Source Multiplayer | Protocol Version 23 | Dec 16 2012 | ||
| 5163 | Counter-Strike: Global Offensive | CS:GO engine branch | Protocol Version 12154 | Dec 26 2012 | ||
| 5191 | Team Fortress 2 | Source Multiplayer | Protocol Version 23 | Jan 23 2013 | ||
| 5198 | Counter-Strike: Source | Source Multiplayer | Protocol Version 23 | Jan 30 2013 | ||
| 5212 | Team Fortress 2 | Source Multiplayer | Protocol Version 23 | Feb 12 2013 | First Linux build | |
| 5243 | Day of Defeat: Source, Counter-Strike: Source, Half-Life 2: Deathmatch | Source Multiplayer (DOD:S) Source 2013 Multiplayer (Beta) |
Protocol Version 16, Protocol Version 24 (CS:S and HL2:DM) | Mar 16 2013 | ||
| 5252 | Counter-Strike: Source, Half-Life 2: Deathmatch | Source 2013 Multiplayer | Protocol Version 24 | Mar 25 2013 | First SteamPipe MP build | |
| 5275 | Team Fortress 2 | Source 2013 Multiplayer | Protocol Version 24 | Apr 17 2013 | ||
| 5288 | Half-Life 2 | Source 2013 Singleplayer | Protocol Version 24 | May 7 2013 | First SteamPipe SP build | |
| 5304 | Counter-Strike: Source | Source 2013 Multiplayer | Protocol Version 24 | May 20 2013 | ||
| 5308 | Counter-Strike: Source | Source 2013 Multiplayer | Protocol Version 24 | May 20 2013 | ||
| 5318 | Portal 2 | Portal 2 engine branch | Protocol Version 2001 | May 30 2013 | ||
| 5336 | Half-Life 2: Episode One, Half-Life 2: Episode Two, Half-Life 2: Lost Coast | Source 2013 Singleplayer | Protocol Version 24 | Jun 17 2013 | ||
| 5337 | Day of Defeat: Source, Counter-Strike: Source | Source 2013 Multiplayer | Protocol Version 24 | Jun 18 2013 | ||
| 5339 | Portal | Source 2013 Singleplayer | Protocol Version 24 | Jun 20 2013 | ||
| 5345 | Half-Life: Source, Half-Life 2, Half-Life 2 Episode One, Team Fortress 2, Half-Life 2: Deathmatch | Source 2013 Singleplayer Source 2013 Multiplayer |
Protocol Version 24 | Jun 26 2013 | ||
| 5353 | Half-Life 2: Deathmatch | Source 2013 Multiplayer | Protocol Version 24 | Jul 4 2013 | ||
| 5365 | Half-Life 2 | Source 2013 Singleplayer | Protocol Version 24 | Jul 16 2013 | ||
| 5434 | Half-Life 2: Episode One | Source 2013 Singleplayer | Protocol Version 24 | Sep 23 2013 | ||
| 5436 | Half-Life 2 | Source 2013 Singleplayer | Protocol Version 24 | Sep 25 2013 | ||
| 5454 | The Stanley Parable | Portal 2 engine branch | Protocol Version 1000 | Oct 13 2013 | ||
| 5476 | Half-Life: Source | Source 2013 Singleplayer | Protocol Version 24 | Nov 4 2013 | ||
| 5543 | Counter-Strike: Global Offensive | CS:GO engine branch | Protocol Version 13200 | Jan 10 2014 | ||
| 5563 | Counter-Strike: Global Offensive | CS:GO engine branch | Protocol Version 13210 | Jan 31 2014 | ||
| 5574 | Counter-Strike: Global Offensive | CS:GO engine branch | Protocol Version 13220 | Feb 11 2014 | ||
| 5595 | Counter-Strike: Global Offensive | CS:GO engine branch | Protocol Version 13250 | Mar 5 2014 | ||
| 5645 | Counter-Strike: Global Offensive | CS:GO engine branch | Protocol Version 13270 | Apr 23 2014 | ||
| 5682 | Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two, Half-Life 2: Lost Coast, Half-Life: Source | Source 2013 Singleplayer | Protocol Version 24 | May 29 2014 | ||
| 5687 | Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two, Half-Life 2: Lost Coast, Half-Life: Source | Source 2013 Singleplayer | Protocol Version 24 | Jun 2 2014 | ||
| 5711 | Half-Life 2: Episode Two | Source 2013 Singleplayer | Protocol Version 24 | Jun 27 2014 | ||
| 5723 | Portal Stories: Mel | Portal 2 engine branch | Protocol Version 2001 | Jul 9 2014 | ||
| 5875 | Portal | Source 2013 Singleplayer | Protocol Version 24 | Dec 8 2014 | ||
| 5916 | Insurgency | CS:GO engine branch | Protocol Version 1606 | Jan 18 2015 | ||
| 5917 | Insurgency | CS:GO engine branch | Protocol Version 1609 | Jan 19 2015 | ||
| 5921 | Insurgency | CS:GO engine branch | Protocol Version 1611 | Jan 23 2015 | ||
| 5931 | Insurgency | CS:GO engine branch | Protocol Version 1615 | Feb 2 2015 | ||
| 6031 | Counter-Strike: Global Offensive | CS:GO engine branch | Protocol Version 13483 | May 13 2015 | ||
| 6186 | Half-Life Deathmatch: Source, Day of Defeat: Source, Counter-Strike: Source, Half-Life 2: Deathmatch, Source SDK 2013 Base Multiplayer | Source 2013 Multiplayer | Protocol Version 24 | Oct 15 2015 | ||
| 6300 | Half-Life Deathmatch: Source, Day of Defeat: Source, Counter-Strike: Source, Half-Life 2: Deathmatch, Source SDK 2013 Base Multiplayer | Source 2013 Multiplayer | Protocol Version 24 | Feb 6 2016 | ||
| 6373 | Garry's Mod | Source 2013 (custom) | Protocol Version 24 | Apr 19 2016 | ||
| 6396 | Half-Life Deathmatch: Source, Day of Defeat: Source, Counter-Strike: Source, Half-Life 2: Deathmatch, Source SDK 2013 Base Multiplayer | Source 2013 Multiplayer | Protocol Version 24 | May 12 2016 | ||
| 6403 | Left 4 Dead 2 | Left 4 Dead engine branch | Network Version 2.0.4.2 | May 19 2016 | ||
| 6579 | Garry's Mod | Source 2013 (custom) | Protocol Version 24 | Nov 11 2016 | ||
| 6796 | Half-Life Deathmatch: Source, Day of Defeat: Source, Counter-Strike: Source, Half-Life 2: Deathmatch, Source SDK 2013 Base Multiplayer | Source 2013 Multiplayer | Protocol Version 24 | Jun 16 2017 | ||
| 6800 | Half-Life Deathmatch: Source, Day of Defeat: Source, Counter-Strike: Source, Half-Life 2: Deathmatch, Source SDK 2013 Base Multiplayer | Source 2013 Multiplayer | Protocol Version 24 | Jun 20 2017 | ||
| 6830 | Left 4 Dead | Source 2013 Multiplayer | ? | Jul 16 2019 | ||
| 7199 | Half-Life Deathmatch: Source, Day of Defeat: Source, Counter-Strike: Source, Half-Life 2: Deathmatch, Source SDK 2013 Base Multiplayer | Source 2013 Multiplayer | Protocol Version 24 | Jul 24 2018 | ||
| 7227 | Left 4 Dead 2 | Left 4 Dead engine branch | Network Version 2.0.4.2 | Jul 16 2019 | ||
| 7412 | Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two, Half-Life: Source | Source 2013 Singleplayer | Protocol Version 24 | Feb 22 2019 | ||
| 7471 | Portal | Source 2013 Singleplayer | Protocol Version 14 | Apr 22 2019 | ||
| 7621 | Counter-Strike: Global Offensive | CS:GO engine branch | Protocol Version 13723 | Sep 19 2019 | ||
| 7629 | Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two, Half-Life 2: Lost Coast, Half-Life: Source | Source 2013 Singleplayer | Protocol Version 24 | Sep 27 2019 | ||
| 7641 | Half-Life Deathmatch: Source, Day of Defeat: Source, Counter-Strike: Source, Half-Life 2: Deathmatch, Source SDK 2013 Base Multiplayer | Source 2013 Multiplayer | Protocol Version 24 | Oct 9 2019 | ||
| 7803 | Counter-Strike: Global Offensive | CS:GO engine branch | Protocol Version 13746 | Mar 19 2020 | ||
| 7891 | Garry's Mod | Source 2013 (custom) | Protocol Version 24 | Aug 7 2020 | ||
| 7834 | Black Mesa | Xengine | Protocol Version 24 | Aug 19 2020 | ||
| 7899 | Portal | Source 2013 Singleplayer | Protocol Version 24 | Jun 23 2020 | ||
| 7915 | Portal 2 | Portal 2 engine branch | Protocol Version 2001 | Jul 9 2020 | ||
| 7929 | Counter-Strike: Global Offensive | CS:GO engine branch | Protocol Version 13762 | Jul 29 2020 | ||
| 7929 | Counter-Strike: Global Offensive | CS:GO engine branch | Protocol Version 13764 | Aug 17 2020 | ||
| 7935 | 7.1.0.9 | Alien Swarm | Alien Swarm engine branch | Protocol Version 7109 | Jul 29 2020 | Latest version for Alien Swarm. |
| 7964 | Team Fortress 2 | Portal 2 engine branch | Protocol Version 24 | Aug 27 2020 | ||
| 7970 | Left 4 Dead 2 | Left 4 Dead engine branch | Network Version 2.1.0.0 | Sep 15 2020 | ||
| 7929 | Counter-Strike: Global Offensive | CS:GO engine branch | Protocol Version 13768 | Sep 16 2020 | ||
| 8007 | Team Fortress 2 | Source 2013 Multiplayer | Protocol Version 24 | Oct 9 2020 | ||
| 8011 | Left 4 Dead 2 | Left 4 Dead engine branch | Network Version 2.1.0.0 | Oct 20 2020 | ||
| 8012 | Counter-Strike: Global Offensive | CS:GO engine branch | Protocol Version 13776 | Jan 7 2021 | ||
| 8012 | Counter-Strike: Global Offensive | CS:GO engine branch | Protocol Version 13780 | Jun 26 2021 | ||
| 8012 | Counter-Strike: Global Offensive | CS:GO engine branch | Protocol Version 13786 | Mar 22 2021 | ||
| 8049 | Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two, Half-Life 2: Lost Coast, Half-Life: Source | Source 2013 Singleplayer | Protocol Version 24 | Nov 20 2020 | ||
| 8098 | Team Fortress 2 | Source 2013 Multiplayer | Protocol Version 24 | Jan 8 2021 | ||
| 8151 | Team Fortress 2 | Source 2013 Multiplayer | Protocol Version 24 | Mar 2 2021 | ||
| 8273 | 6630498 | Half-Life Deathmatch: Source, Day of Defeat: Source, Counter-Strike: Source, Half-Life 2: Deathmatch, Source SDK 2013 Base Multiplayer | Source 2013 Multiplayer | Protocol Version 24 | Jul 2 2021 | Last Source 2013 MP build (before replaced by TF2 branch) |
| 8504 | 7087047 | Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two, Half-Life: Source | Source 2013 Singleplayer | Protocol Version 24 | Feb 18 2022 | Steam Deck update |
| 8802 | 1575 (client/server) 8413246 (SourceRevision) |
Counter-Strike: Global Offensive | CS:GO engine branch | Protocol Version 13881 | Aug 24 2023 | Last CS:GO version (csgo_legacy) beta branch |
| 8928 | Portal 2 | Portal 2 engine branch | Protocol Version 2001 | Feb 2 2024 | ||
| 9505 | 9350367 | Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two, Half-Life: Source | Source 2013 Singleplayer | Protocol Version 24 | Nov 15 2024 | Half-Life 2 20th Anniversary Update |
| 9568 | Protocol Version 2001 | Jan 17 2025 | Latest version for Portal 2 (Windows). | |||
| 9578 | 9525199 | Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two, Half-Life: Source | Source 2013 Singleplayer | Protocol Version 24 | Jan 27 2025 | Beta released same day. Publicly released Feb 11, 2025. Latest version for HL2, HL:S. |