List of third-party Source games
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List of Source engine games made by third-party companies and mod teams.
2004 - 2009
| Year | Title | Developer(s) | Publisher(s) | Engine branch | Platforms | Notes     |
|---|---|---|---|---|---|---|
| 2004 |  Vampire: The Masquerade - Bloodlines |
Troika Games | Activision |  Source 2004 (Beta) |
PC: Windows | First third-party game to use Source engine. Runs on the earlier, beta version of Source 2004, referred to as the Half-Life 2 Beta/leak (or Source 2003) engine. It uses a proprietary format for the materials and texture files. Also the first Source game to use Bink video, prior to Source 2007. |
| 2004 |  JBMod |
TEAM JBMOD | TEAM JBMOD | Source 2004 (launch) Source 2013 Multiplayer |
PC: Windows, Linux | Earliest Source mod to be created, shortly after the release of Source SDK. It is also the spiritual predecessor to Garry's Mod. The game was later re-released on Steam in 2022, running on Source 2013. |
| 2005 |  Synergy |
Synergy Team | Synergy Team |  Source 2006 (pre-Steam) Source 2013 Multiplayer (current) |
PC: Windows, Mac, Linux | A co-op mod that allows you to play the entire Half-Life 2 campaign in Multiplayer. |
| 2005 |  Dystopia |
Puny Human | Puny Human | Source 2013 Multiplayer |
PC: Windows, Linux | |
| 2006 |  SiN Episodes |
Ritual | Ritual | Source 2004 |
PC: Windows | Last game by Ritual Entertainment, having only one out of nine episodes released, prior to the acquisition by MumboJumbo. No new episodes were created after the acquisition. The game runs on mix of both Source 2004 with some beta Source 2006 (or possibly the 2005 version of Lost Coast) code[confirm] (as there are non-functional HDR console commands). |
| 2006 |  The Ship: Murder Party (MP) The Ship: Single Player |
Outerlight Ltd. | Outerlight Ltd. (original, digital) Mindscape (EU) Mersom (US) Blazing Griffin (current) |
Source 2006 |
PC: Windows | Specific soundscape sounds can be set to act as "music", letting them be affected by snd_musicvolume |
| 2006 |  Dark Messiah of Might and Magic |
Arkane Studios, Ubisoft Annecy ( ) |
Ubisoft | Source 2006 (PC) Source 2007 (Xbox 360) |
PC: Windows Consoles: Xbox 360 |
First third-party Source engine game to be released on consoles, specifically, the Xbox 360 (as Dark Messiah of Might and Magic: Elements). |
| 2006 |  Garry's Mod |
Facepunch Studios | Valve | Source 2004 (launch, 1.0) Source 2006 (GMod 10, commercial release) Source 2013 (heavily modified) |
PC: Windows, Mac, Linux | Originally released in 2004 as GMod 1.0 (sometimes refers as Beta release), this is a third-party game (formerly, a Source SDK mod) that was published by Valve (first-party) with the release of GMod 10 and later versions. Unlike previous versions (GMod 9 or earlier), it is not free and requires purchase. When the GMod 13 was released in 2012, it initially ran on Source MP, which was later upgraded to Source 2013. After GMod 13, the game, and its Source 2013 branch transitioned to  Software as a service-like model which meant that GMod will be frequently updated every month, and Facepunch begin to heavily modify the engine by adding experimental support for  Alien Swarm engine branch and  Portal 2 engine branch or later features, such as VTF 7.5, BSP 21 and 64-bit support, and combining code from both 2013's SP and MP branch[confirm]. |
| 2007 (Mod) 2008 (Steam) |
 Fortress Forever |
Fortress Forever Development Team, Trepid Studios | Fortress Forever | Source 2006 Source 2013 Multiplayer (In development) |
PC: Windows, Linux | |
| 2007 |  Age of Chivalry |
Team Chivalry | Team Chivalry | Source 2007 |
PC: Windows | |
| 2007 (Mod) 2008 (Steam) |
 Zombie Panic! Source |
Zombie Panic! Team | Zombie Panic! Team | Source 2013 Multiplayer (current) |
PC: Windows, Linux | |
| 2007 |  INSURGENCY: Modern Infantry Combat |
Insurgency Development Team | New World Interactive | Source 2006 |
PC: Windows | |
| 2008 |  D.I.P.R.I.P. |
EXOR Studios | EXOR Studios | Source 2007 |
PC: Windows | |
| 2009 |  Zeno Clash |
ACE Team | Iceberg Interactive, Tripwire Interactive |  Source 2009 (PC) Left 4 Dead engine branch (Xbox 360) |
PC: Windows Consoles: Xbox 360 |
Xbox 360 version uses Left 4 Dead engine branch and released in 2010. |
| Year | Title | Developer(s) | Publisher(s) | Engine branch | Platforms | Notes |
2010 - 2019
| Year | Title | Developer(s) | Publisher(s) | Engine branch | Platforms | Notes |
|---|---|---|---|---|---|---|
| 2010 |  Bloody Good Time |
Outerlight Ltd. | Ubisoft | Source 2007 |
PC: Windows Consoles: Xbox 360 |
|
| 2010 (Website) 2012 (Steam) |
 Vindictus |
devCAT | NEXON Korea Corp. & NEXON America Inc. | Source 2006 (heavily modified) |
PC: Windows | Heavily modified, and uses proprietary file format to store game files. Also support DirectX 11. Even though Source 2007 and Source 2009 were available for licensing by the time the game was released, the game was built on Source 2006 instead. |
| 2010 |  Blue Portals |
Reepblue | Reepblue | Source 2013 |
PC: Windows | |
| 2011 |  Dino D-Day |
800 North and Digital Ranch | 800 North and Digital Ranch | Portal 2 engine branch |
PC: Windows | Originally Left 4 Dead engine branch when it was released, later upgraded to Portal 2 engine branch. |
| 2011 |  E.Y.E: Divine Cybermancy |
Streum On Studio | Streum On Studio | Source 2007 |
PC: Windows | |
| 2011 |  Nuclear Dawn |
GameConnect, InterWave Studios | Iceberg Interactive | Left 4 Dead engine branch |
PC: Windows | |
| 2011 |  No More Room in Hell |
No More Room in Hell Team | Lever Games | Source 2013 |
PC: Windows | |
| 2011 |  Postal III |
Trashmasters | Akella | Source 2009 |
PC: Windows | This game is infamous for being the worst commercially released Source engine game at all time, leading to Akella eventually becoming bankrupt. Originally delisted on Steam in Dec 2022 due to ActControl DRM server issues, which was later resolved after the remains of Akella gave RWS limited access to the game store page, and, RWS, with Zoom Platform together patch the game with bug and crash fixes by injecting the  p3.dll file into the game, plus making it DRM-Free. |
| 2009 (Mod) 2012 (Steam) |
 Dear Esther |
The Chinese Room, Robert Briscoe | The Chinese Room, Secret Mode | Source 2007 (Mod) Source 2009 (Steam) |
PC: Windows | The 2012 version of the game, which runs on Source 2009 is no longer sold on Steam, being replaced by Landmark Edition remaster that runs on Unity engine. It is still available on Humble Store, however. The original 2009 mod of this game is also still available on ModDB. |
| 2012 |  Revelations 2012 |
Dark Artz Entertainment | Dark Artz Entertainment | Left 4 Dead engine branch |
PC: Windows | |
| 2012 |  Hybrid |
5th Cell | Xbox Game Studios (formerly Microsoft Studios) | Left 4 Dead engine branch |
Consoles: Xbox 360 | Console-exclusive title. |
| 2013 (delisted) |  Tactical Intervention |
FIX Korea, Co.LTD, FIX Games, Co. LTD | FIX Games, Co. LTD | Portal 2 engine branch[confirm] |
PC: Windows | No longer available. |
| 2013 |  The Stanley Parable |
Galactic Cafe | Galactic Cafe | Portal 2 engine branch |
PC: Windows, Mac, Linux | This modified branch was later used in  The Beginner's Guide. A sequel, expanded and re-imagination of The Stanley Parable was later released in 2022 as The Stanley Parable: Ultra Deluxe, which runs on the Unity engine. |
| 2013 |  Counter-Strike Online 2 |
Nexon | Nexon | Source 2009 or Source 2013 (heavily modified)[confirm] |
PC: Windows | Currently unknown whether it uses Source 2009 or 2013. Like Counter-Strike Online, it's also used proprietary file format to store its game files. The engine used in this game have new features such as CSM shadows and LZMA-compressed VTF files. |
| 2014 (delisted) | Consortium | Interdimensional Games | Interdimensional Games | Portal 2 engine branch |
PC: Windows | Delisted in favor of the remaster running on Unreal Engine 4. Purchasing the remaster (or Consortium VR) will give you access to the 2014 Source version. |
| 2014 |  Blade Symphony |
Puny Human | Puny Human | Portal 2 engine branch (confirm) |
PC: Windows | Originally released as a Early Access game in 2013. |
| 2014 | Insurgency |
New World Interactive | New World Interactive |  CS:GO engine branch (earlier version) |
PC: Windows | |
| 2014 |  Titanfall |
Respawn Entertainment | Electronic Arts | Titanfall branch |
PC: Windows Consoles: Xbox 360, Xbox One |
Likely delisted on PC (Origin/EA Play and Steam) due to low player count and constant server issues due to being DDoS attacked, plus the game also have multiple security vulnerabilities. Existing owners can still play the game. The engine was heavily modified from Portal 2 engine branch. Also first Source engine game to be released for eighth-gen consoles. |
| 2014 |  Contagion |
Monochrome, Inc | Monochrome, Inc | Left 4 Dead engine branch |
PC: Windows | Spiritual successor to Zombie Panic! Source. |
| 2014 (Steam) |  NEOTOKYO° |
STUDIO RADI-8 | STUDIO RADI-8 | Source 2006 |
PC: Windows | Originally released in 2009 as a SourceMod that requires Source SDK Base 2006 to be installed, later released on Steam in 2014, which is completely standalone. |
| 2014 (Steam) |  Fistful of Frags |
Hoobalugalar_X | Raptor Byte | Source 2013 |
PC: Windows, Mac, Linux | Originally released as a mod in 2007 on ModDB. |
| 2014 |  Lambda Wars |
Vortal Storm | Vortal Storm | Alien Swarm engine branch |
PC: Windows | |
| 2014 |  Team Fortress 2 Classic |
Eminoma Team | Eminoma Team | Source 2013 Multiplayer |
PC: Windows | First Team Fortress 2 Source mod to be released. A newer version running on  Team Fortress 2 branch is in development. |
| 2015 |  Portal Stories: Mel |
Prism Game Studios Ltd. | Prism Game Studios Ltd. | Portal 2 engine branch (earlier version) |
PC: Windows, Mac, Linux | Requires Portal 2 to be installed to play. |
| 2015 (Steam) | Codename Cure | Hoobalugalar_X | Raptor Byte | Source 2013 |
PC: Windows, Mac, Linux | Originally released as a mod in 2013 on ModDB. |
| 2015 | Double Action | Double Action Factory | Double Action Factory | Source 2013 Multiplayer |
PC: Windows, Linux | |
| 2015 | The Beginner's Guide |
Everything Unlimited Ltd. | Everything Unlimited Ltd. | Portal 2 engine branch |
PC: Windows, Mac, Linux | Based off modified version of The Stanley Parable engine, which itself was also modified from Portal 2 engine branch. |
| 2016 |  Wilson Chronicles |
Frere d'Arme | Frere d'Arme | Source 2013 |
PC: Windows | |
| 2016 |  INFRA |
Loiste Interactive | Loiste Interactive | Portal 2 engine branch |
PC: Windows | |
| 2016 |  Titanfall 2 |
Respawn Entertainment | Electronic Arts | Titanfall branch |
PC: Windows Consoles: Xbox One, PlayStation 4 |
A sequel to Titanfall. First Titanfall game to have a singleplayer campaign. |
| 2016 |  Day of Infamy |
New World Interactive | New World Interactive | CS:GO engine branch (earlier version) |
PC: Windows, Mac, Linux | |
| 2017 |  Alien Swarm: Reactive Drop |
Reactive Drop Team | Reactive Drop Team | Alien Swarm engine branch |
PC: Windows | |
| 2017 |  Entropy : Zero |
Breadman | Breadman |  Source 2013 Singleplayer |
PC: Windows | |
| 2018 |  Hunt Down the Freeman |
Royal Rudius Entertainment | Royal Rudius Entertainment | Source 2013 Multiplayer |
PC: Windows | In later updates, the game was transfered from Source 2013 SP to MP codebase. The engine has been heavily modified over time, adding feature such as: Parallax Corrected Cubemaps, PBR textures, WebM (replaces Bink), FMOD for audio, and much more... This game was largely criticized by players for numerous reasons like its bugs, poor design, developers of this game not having been paid. |
| 2019 |  Apex Legends |
Respawn Entertainment | Electronic Arts | Titanfall branch |
PC: Windows | Heavily modified, like previous Titanfall games. Replaced HBAO+ ambient occlusion and MSAA anti-aliasing to SSAO and TAA respectively, aswell as being the only Source game that supports DirectX 12 (Direct3D 12) natively. |
| 2019 |  Open Fortress |
Open Fortress Development Team | Open Fortress Development Team | Source 2013 Multiplayer |
PC: Windows | The fourth Team Fortress 2 Source mod to be released, with TF2Vintage having been released in 2017, and Team Deathmatch Classic being launched in 2018. |
| 2019 |  Pre-Fortress 2 |
Pre-Fortress 2 Team | Pre-Fortress 2 Team | Source 2013 Multiplayer |
PC: Windows | The fifth Team Fortress 2 Source mod to be released. |
| Year | Title | Developer(s) | Publisher(s) | Engine branch | Platforms | Notes |
2020 - present
| Year | Title | Developer(s) | Publisher(s) | Engine branch | Platforms | Notes |
|---|---|---|---|---|---|---|
| 2020 |  Black Mesa |
Crowbar Collective | Crowbar Collective |  Xengine |
PC: Windows, Linux | Black Mesa was originally released in 2012 as a mod running on Source 2007. Fan remake of  Half-Life. |
| 2020 | G-String | Eyaura | LunchHouse Software | Source 2013 |
PC: Windows | |
| 2021 |  Portal Reloaded |
PORTAINIS | PORTAINIS | Portal 2 engine branch |
PC: Windows, Mac, Linux | |
| 2022 |  Divinia Chronicles: Relics of Gan-Ti |
Team Monkey | Team Monkey | Source 2013 Singleplayer |
PC: Windows | |
| 2022 |  BrainBread 2 |
Reperio Studios | Reperio Studios | Source 2013 Multiplayer |
PC: Windows, Mac, Linux | Originally available as Early Access in 2016. |
| 2022 |  Entropy : Zero 2 |
Breadman | Breadman | Source 2013 Singleplayer ( Mapbase) |
PC: Windows | Sequel to Entropy : Zero. |
| 2022 |  They Hunger: Source |
Post-GoldSOURCE | Post-GoldSOURCE | Source 2013 Singleplayer |
PC: Windows | |
| 2022 |  Jabroni Brawl: Episode 3 |
Team Jabroni | Team Jabroni | CS:GO engine branch |
PC: Windows, Linux | |
| 2023 |  Mistake: Source |
NOUG4AT | Unified Network | Source 2013 Singleplayer |
PC: Windows | |
| 2023 |  Swelter |
SnowDropEscape development team | Eduard Rostovtsev, SnowDropEscape development team | Source 2013 Singleplayer |
PC: Windows, Linux | |
| 2024 |  Portal: Revolution |
Second Face Software | Second Face Software |  Strata Source |
PC: Windows, Linux | First  Source game to use Strata Source engine, a heavily modified version of Source which features many changes and improvements to bring it closer to modern standards. |
Unreleased
This section are for unreleased 3rd party games and tools that are not publicly released or is in Beta/Early Access.
| Release Date | Title | Developer(s) | Publisher(s) | Engine branch | Platforms | Notes |
|---|---|---|---|---|---|---|
| 2025 |  Military Conflict: Vietnam |
Dustfade | Dustfade | CS:GO engine branch |
PC: Windows, Linux | Early access since 2022, planned to be released around 2025. Quote from Military Conflict: Vietnam Steam page: The game will stay in Early Access until all planned initial content is released, the current estimate of which is during 2025. |
| TBA |  CS:Legacy |
CS:Legacy Team | TBA | Source 2013 (sub-branch TBD) |
PC: TBA | Remake of Counter-Strike, developed by (some) former CSPromod developers. Runs on modified version of Source 2013 (presumably Team Fortress 2 branch), with the game renderer completely rewritten. Features PBR shaders, CSM and other graphical improvements. |
| TBA |  Half-Life 2 RTX |
Orbifold Studios | Orbifold Studios | Source 2013 Singleplayer (with Mapbase) |
PC: Windows | Second Source game to use RTX Remix technology which adds ray-tracing support along with (PBR textures, etc.). The mod also uses Mapbase. A demo version was released on March 18, 2025. |
| TBA | Infestus | Team Infestus | Team Infestus | Source 2013 Multiplayer |
PC: Windows, Mac, Linux | Currently in closed beta. |
| TBA |  Momentum Mod |
Momentum Team | Momentum Team | Strata Source |
PC: Windows, Linux | Currently in closed beta. |
| TBA |  Portal 2: Community Edition |
P2:CE Team | P2:CE Team | Strata Source |
PC: Windows, Linux | Currently in closed beta. |
| TBA |  PUNT |
LunchHouse Software | LunchHouse Software | Portal 2 engine branch (heavily modified) |
PC: Windows |