Half-Life, Half-Life 2

Clans and Guilds, Halo - Combat Evolved, Halo 2, Reviews and Previews, Grunty Thirst Corporation, Halo Everything, Halo Factor, Halo Mods, Halo News from Rampancy, Halo Tips, Halo-HQ, halo.bungie.org, HaloChat, HaloDev Forums

F.A.K.K.2, Geomatrix

GameSpot, The Adrenaline Vault

Heretic, Heretic II, Hexen, Hexen 64, Hexen II, Heretic and Hexen source code release page, Hexen

Hitman - Codename 47, Hitman - Contracts, Hitman 2 - Silent Assassin, Reviews and Previews, Hitman2.net, HitmanHQ, HitmanWeb

House of the Dead, House of the Dead 2, House of the Dead III