Bad At Games
- Cheat codes and hints.
- http://www.badatgames.com/cheats_119887_pc_halflife_2.html

Wikipedia: Half-Life 2
- Encyclopedia article on the game covers backstory, plot summary, gameplay, awards, add-ons, derivative works, technical specifications, and soundtrack.
- http://en.wikipedia.org/wiki/Half-Life_2

Play.tm
- Gives news, images, video and downloads.
- http://play.tm/indepth/half-life_2

GameShout.com
- Offers news, review, cheats, system requirements, guide, and a walkthrough.
- http://www.gameshout.com/pc/halflife2/

Dedicated Server Console Commands
- A list of console commands for Half-Life 2 Dedicated Server.
- http://www.xdude.com/hl2dedicatedserverconsolecommands.htm

GameFAQs
- FAQs, cheats, reviews, and a message board.
- http://www.gamefaqs.com/computer/doswin/data/914642.html

Team Xbox
- Information, screenshots, and a preview.
- http://games.teamxbox.com/xbox/1200/HalfLife-2/

FilePlanet
- Demos, wallpapers, movies, trailers, maps, and modifications.
- http://www.fileplanet.com/93939/0/section/Half-Life-2

3D Gamers
- Includes information, news, screenshots, and downloads.
- http://www.3dgamers.com/games/halflife2/

IGN
- News, press releases, previews, reviews, cheats, FAQs, screenshots, and videos.
- http://pc.ign.com/objects/492/492830.html

Source Dedicated Server
- Server resource for HL2-based games. Includes a discussion forum and knowledge base.
- http://www.srcds.com/

Half-Life 2
- Official site. Includes screenshots, trailers, and a game overview.
- http://www.half-life2.com/

GameSpy
- Includes cheats, interviews, videos and articles.
- http://pc.gamespy.com/pc/half-life-2/

Filefront
- Offers downloads and news of modifications, maps and patches.
- http://halflife2.filefront.com/

Punk Ass Fraggers
- Offers forums, news and system tweaking guide. Includes downloads area with maps and modifications.
- http://www.punkassfraggers.com/

Laggfree
- Includes guides, forums, and downloads to help reduce lag on servers.
- http://cpnclan.home.comcast.net/

Counter-Strike Game Zone
- Forums for game and technical discussions.
- http://www.csgamezone.com/

Half-Life Source
- News, community forum, demos, maps, models, Steam support, and patches.
- http://www.halflifesource.com/half-life2/

Half Life 2 Files
- Character information, screenshots, news, weapons, story line, game FAQ, cheats, skins, mods, models, maps and game utilities.
- http://www.halflife2files.com/

HL2C
- Game information, weapons information, character information, FAQ, forum, chat room, polls, interviews and game reviews.
- http://www.hl2central.net/