Template:Source games/2000s

Note:This section is for third-party games released in 2004-2009. This also includes games that were formerly a Source SDK Base mod. Due to template limitations, it was split into this subpage.

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.
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 a mod before becoming standalone around 2011. This is a third-party game (formerly, a Source SDK mod) that was published by Valve (first-party) since the release of GMod 10 and later versions. Unlike previous versions (GMod 9 or earlier), it is not free and requires purchase. GMod 1.0 up to GMod 10 runs on Source 2006 (via Source SDK Base 2006), GMod 11 runs on Source 2007 (via Source SDK Base 2007), and GMod 12 Beta runs on Source 2007 (and requires SDK Base), but later versions of GMod 12 runs on Source 2009 then Source MP branch while also being standalone for the first time. When GMod 13 was released in 2012, it also 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, MP, and later in 2025 with Team Fortress 2 branch.
2007 (Mod) 2008 (Steam)	Zombie Panic! Source	Zombie Panic! Team	Zombie Panic! Team	Source 2013 Multiplayer (current)	PC: Windows, Linux
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