==Cross-Purpose and General Development==
* [http://collective.valve-erc.com/ VERC] - Valve Editing Resource Collective. This site's predecessor, which offers primarily HL1 resources (Official)
* [http://www.acidvat.com/?view=remotetutorials&game=2 Acid Vat's HL2 Tutorial Database] - A list of almost every Half-Life 2 modding tutorial out there.* [http://www.c-sec.net/ C-SEC] - Japanese Source modding and mapping development site, including with translated many SDK documents to Japanese.* [http://game-advance.net/ Game-Advance.net] - Very small new modding community. Focus is on source engine, but forums exist for non-source modding as well. Hosts modding projects.* [http://www.gamedesign.net Gamedesign.net] - Some helpful modding and mapping tutorials.* [http://www.gamesmodding.com/?view=remotetutorials&game=2 GamesModding.com Tutorial Database] - A list of almost every Half-Life 2 modding tutorial out there.* [http://www.handyvandal.com/ Handy Vandal's Almanac] - One of the original top editing resource sites for Half Life, contains some HL2 info. Linked to in [[Worldcraft]]'s help menu.* [http://hl.tozcentral.net/ hl.tozcentral.net] - Half Life and Half-Life 2 resource, Post your own bots, maps, media, mods and tutorials* [http://hl2world.com/wiki HL2World.com] - Half Life 2 Knowledge Base* [http://www.interlopers.net/ Interlopers.net] - News and general resources * [http://www.mapcore.net Mapcore] - A great place to get mapping, modelling and texture help from industry pros.* [http://www.modhelp.net Modhelp.net] - A developing modding community.* [http://www.moddb.com Mod Database] - Free listings of mods for almost every moddable game. A great database full of tons of information on mods that are out there.* [http://www.mod-hq.com Mod HQ] - Comprehensive news resource for Half-Life 2 modifications and Steam related content in general. Valve visits it. Will you?* [http://nemesis.thewavelength.net/index.php Nem's Tools] - Several useful Source tools including [[GCFScape]]* [http://www.pixelgames.com PixelGames] - File reviews and downloads, real friendly editing site based on community!<!-- Under construction... [http://www.hl2modcentral.com/ HL2 Mod Central] - General tutorials -->* [http://www.snarkpit.net The Snarkpit] - Mapping and modelling community site* [http://www.sourceblog.org Sourceblog] - General tutorials (Many on Texturing/[[Skinning]])* [http://www.sourcewiki.org/wiki/index.php/Main_Page SourceWiki] - Unofficial and older Source Wiki* [http://twhl.co.za/ TWHL] - Mapping community and tutorial site, mostly HL1.* [http://www.thewavelength.net Wavelength] - One of the original sources of HL1 editing material, now steadily servicing HL2* [http://wunderboy.org Wunderboy.org] - Several useful Source tools including [[VTFTool]]
==Mapping==
* [http://ammahls.com/index.php?page=downloadcat&cat=tools Custom Source Tools] - Source Mapping Compile Tools - Faster, and more helpful with errors over the V Tools (Includes 64bit, and Linux versions)
* [http://www.violator.eclipse.co.uk/disped/ DispEd] - Precise displacement editor used to make geometric shapes in the style of "Quake 3 patches."* [http://www.editlife.net/ Edit Life] - Mapping articles, entity list, error documentation and forums* [http://www.halfwit-2.com/ Half-wit 2] - Another collection of Mapping tutorials* [http://www.hl2mapping.com Hl2Mapping.com] - A Friendly helpful, mapping community.*[http://www.iwannamap.com I Wanna Map] - You wanna map, We wanna help. For Tutorials and help* [http://madedog.pri.ee/index.php?option=com_content&task=category§ionid=3&id=72&Itemid=44 Madedog's E-Portal] - A small amount of great step-by-step tutorials.* [http://www.niridastudios.com NiRiDa Studios] - Comunidad Española de Edición en Source - Spanish Community for the Source Engine edition tutorials.* [http://www.robotchaos.com/ RobotChaos Map Making Tutorial - Along with a few other things (Sprays, etc.)] - Has a small ever building step by step tutorial on making maps taken from a beginner's perspective.* [http://shammers.forumsplace.com/ Shammers Forums] - A small community, with a couple of useful tutorials.* [http://www.sourceprefabs.com SourcePrefabs.com] - Great source for download-able prefabs to use in Hammer with a growing community.* [http://www.student.kun.nl/rvanhoorn/Optimization.htm zombie's Optimizing-page] information on optimizing your map* [http://www.nysteo.com/contentindex.php?optimize zombie's *Edited* Optimization Page] An in-depth guide to optimizing your maps.*[http://www.spillmodding.no/ Spillmodding.no] A norwegian mapping community with more than 130 tutorials for more than 13 engines!*[http://www.taz00.com/ TAz00.com] 22+ Tutorials on Mapping, Beginner to Advanced, 10+ Maps with source files included!*[http://www.mapping-area.com/ Mapping-area] - Tutorials on Mapping, Beginner to Advanced, all in french!
==Modeling==
* [http://cannonfodder.chaosincarnate.net/cftools.htm Cannonfodder's Tools] - [[3dsmax tools|3DSMax Importers and Exporters]], [http://developer.valvesoftware.com/wiki/dispgen Dispgen - Displacement Terrains from heightmaps], [[studiocompiler|StudioCompiler - Model/Texture Compiler/Decompiler]], [http://developer.valvesoftware.com/wiki/winBSPzip winBSPzip - BSP Packer]
* [http://www.cgtalk.com CG Talk] The largest and most useful model discussion/news site on the internet.
* [http://ii.hl2files.com/sdk/introduction.php Insects Infestation - II SDK modeling] Export models to Source engine tutorials for 3DSMax, Maya, MS3D, XSI, FRAG.
* [http://forum.resistanceandliberation.com/showthread.php?t=806 RnL Forums' Lightwave Plugins] - Lightwave mesh export plugins. Not currently available, but may be in the future.
* [http://www.redemptionmod.com Redemption] - Modeling tutorials and blog for XSI and HL2 Source
==Programming==
* [http://hl2coding.com/ Hl2 Coding] - Has some good hl2 related coding tutorials and has great forums for coders to chat.
* [http://msdn.microsoft.com/coding4fun/half-life/default.aspx MSDN] - MSDN Half-Life Coding4fun.
* [http://www.priyajeet.net/web/MSDN/ Game Programming in C#] - 11-part Video Tutorial for Game Programming from MSDN.
* [ftp://ftp.idsoftware.com/idstuff/source/ Quake Engine Source Code] - Source code from old Quake (used by Half-Life too) and Doom games.
* [http://msdn.microsoft.com/directx/default.aspx?pull=/library/en-us/directx9_c/directx_sdk.asp Directx C++] - Documentation for Unmanaged Directx
* [http://msdn.microsoft.com/library/en-us/directx9_m/directx/directx9m.asp?frame=true Directx Managed] - Documentation for Managed Directx
* [http://www.mdxinfo.com/ Managed Directx Info] - Includes various resources, tools, samples, code snippets for Managed Directx
* [http://www.microsoft.com/downloads/details.aspx?FamilyID=6d790cde-c3e5-46be-b3a5-729581269a9c&DisplayLang=en Mech Commander 2] - Entire game and source code. Can serve as an example fo learning programming.
* [http://www.gamedev.net/ Gamedev] - Website with a lot of useful resources for game developers.
* [http://www.planofattackgame.com/news.php Plan of Attack Source Code] - The entire source code (including art assets) for the Plan of Attack mod, free to use in other mods.
* [http://msdn.microsoft.com/coding4fun/gamedevelopment/rocketcmd/default.aspx Tutorials of Rocket Commander] - 10-Part Howto make 3D Games Tutorial
==Other==
==Map Archives==
* [http://www.17buddies.net 17buddies] - French community of gamers - Map Downloads, tools .
* [http://www-personal.umich.edu/~fischmt/ascendancy/index.html The Ascendancy] - What you're trying to live up to. Database of the very best HL2DM maps.<br>
* [http://csm2.net/ CSM2] - Map Downloads,Tutorials and mapping help forums.
* [http://www.lanmaniax.com LanManiaX] - The largest map database for HL\HL2.
* [http://www.nlxr.com The Nightlight Mapping] - Maps devoted to realistic locations.
* [http://www.dimensionstudios.org Dimension Studios] - Professional level design team. Order Source and Pre-Source maps. Also view tutorials in the forums.
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==Image Creation and Editing==
*[http://adobe.com/ Adobe Photoshop] - The standard image editing tool in the industy, used by professionals all over the world. Very expensive.
*[http://www.adobe.com/products/photoshopelwin/main.html Adobe Photoshop Elements] - Low-cost, consumer version of Photoshop with high-end features such as colour management removed.
*[http://www.gimp.org/ The GIMP] - Completely free, open source image editing software available for Windows, Linux, Mac OS X and other UNIX operating systems. Complex to use, but powerful, scriptable and endlessly modifiable.
*[http://jasc.com/ Paint Shop Pro] - A cheap alternative to Adobe Photoshop. For those who don't want to break the bank.
*[http://www.telefragged.com/wally/ Wally] - Simple freeware texture/decals/skining editing program.
*[http://www.eecs.wsu.edu/paint.net/index.html Paint.NET] - An open source .NET based image manipulation program.
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==3D Modelling, Animation and Rendering==
*[http://discreet.com/ 3D Studio Max] - Powerful tool for modeling and animation, one of the industry's best. Expensive.
*[http://www.blender.org/ Blender] - Free, open source modeling, animation, rendering, post-production, interactive creation and playback library/engine/IDE.
*[http://www.newtek.com Lightwave 3D] - Excellent modelling & animation tool. See [[Lightwave]] for links to HL2 exporters. Like every other high end package, it is considered to be one of the best by its fans. :) Expensive, but less so than others.
*[http://alias.com/ Maya 3D] - Excellent modeling and animation package. Considered to be one of the best among modders. Also expensive.
*[http://www.milkshape3d.com Milkshape3D] - Low cost, popular and simple to use 3D modelling program.
*[http://www.softimage.com Softimage|XSI] - Program used to make models & animations for HL2. XSI Mod Tool is available for FREE.
*[http://www.wings3d.com Wings3D] - Free, open source Nendo-alike natural modeling IDE.
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Content for your project.
* [http://www.animax.it/ Animax.it] - Free textures.
* [http://www.imageafter.com/ Image * After] - 10,000+ free images and textures.
* [http://www.mayang.com/textures/ Mayang.com Textures] - Free textures for your maps and mods.
* [http://forum.moddb.com/thread/1975/ Moddb texture site directory] - Directory of free, ready to use game textures.
* [http://www.morguefile.com/ MorgueFile] - Free, high-resolution stock photography.
* [http://perso.wanadoo.fr/oyonale/ Oyonale] - Small library of source photos suitable for turning into textures, courtesy of [http://www.oyonale.com/ Gilles Tran].
* [http://www.locationworks.com/ LocationWorks] - Lots of pictures, anything from old castles to pubs.
* [http://www.sxc.hu/ SXC.HU] - Huge library of images.
===Photo Reference===
* [http://www.3d.sk 3d.sk] - Human Photo References for 3D Artists and Game Developers (large source -partly free)
* [http://www.textureref.com TextureRef.com] - Online repository of Texturekits and high-res Photo References for Artists (small source - partly free)* [http://www.morguefile.com/ Morguefile.com] - Lots of free photos. Anything from fruit to cement factories.* [http://www.shutterstock.com ShutterStock] - 700,000 photos/vectors/illustrations/images/etc avail by subscription. All royalty-free.
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==Game Design==
* [http://forum.moddb.com/thread/4386/ Game Design Theory] - Interesting for art directors, team leaders
* [http://www.gamasutra.com/features/19991210/birdwell_pfv.htm Ken Birdwell's Gamasutra article] - The Cabal: Valve’s Design Process For Creating Half-Life (registration required)
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==[[:Category:Steam|Steam]]==
* [http://forums.steampowered.com/forums/ Steampowered forums]
* [http://www.steamreview.org/ The Steam review] - Comment and discussion on Valve Software’s digital distribution platform.
===[[:Category:Steam Applications|Steam Applications]]===
* [[Steam Application IDs]]
* [[:Category:Official third party games|Official Third Party Games]]
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==Modifications==
* [[:Category:HL1 Third Party Mods|HL1 Third Party Mods]] {{HL1}}
* [[:Category:HL2 Third Party Mods|HL2 Third Party Mods]] {{HL2}}
* [[:Category:Official Games|Official Games]] {{HL1}} {{HL2}}
* [[:Category:Official Third Party Goldsource Games|Official Third Party Goldsource Games]] {{hl1}}
* [[:Category:Official Third Party Source Games|Official Third Party Source Games]] {{hl2}}
* [[:Category:Official third party games|Official Third Party Games]]
{{category end}}
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