Popular games built on game engine GoldSrc

Dr. Gordon Freeman doesn't speak, but he's got a helluva story to tell. This first-person roller-coaster initiated a new era in the history of action games by combining engrossing gameplay, upgraded graphics, ingenious level design and a revolutionary story that may not be all that it seems, told not through cutscenes, but through the visual environment.

Cry of Fear is a single-player, horror modification for Half-Life 1 that brings you all the horrors you have always been afraid of. This is a free total converstion of Half-Life 1, which means none of the assets from Half-Life 1 have been used in this mod or any files from other people, it is a totally unique experience. Everything is made exclusively by Team Psykskallar, the Cry of Fear developers.

Play the world's number 1 online action game. Engage in an incredibly realistic brand of terrorist warfare in this wildly popular team-based game. Ally with teammates to complete strategic missions. Take out enemy sites. Rescue hostages. Your role affects your team's success. Your team's success affects your role.

Sven Co-op is a co-operative game originally based around Valve Software's Half-Life. In this game players must work together against computer controlled enemies and solve puzzles as a team.

Half-Life 1: MMod is a free, fan made modification for Half-Life aiming to refine player's arsenal and further expand player's combat options. Featuring AI tweaks, VFX and SFX overhaul in spirit of original, additional weapon functionality and bug fixes, while keeping most changes optional.

Opposing Force returns to the same setting as Half-Life, but instead portrays the events from the perspective of a U.S. Marine, one of the enemy characters in the original game. The player character, Adrian Shephard, is sent in to neutralize the Black Mesa Research Facility after a scientific mishap causes it to be invaded by aliens, but quickly finds that the Marines are outnumbered and slowly being beaten back by a second alien race and black operations units.

Half-Life: Uplink is a demo version of Valve's 1998 first-person shooter computer game Half-Life. Uplink features many of the common enemies, characters, and weapons from the full game, but unlike the first Half-Life demo and the Half-Life 2 demo, the location and scenario in this demonstration do not appear in Half-Life. The Uplink chapters were cut during Half-Life's development phase and roughly fit in prior to or during the Lambda Core chapter; they were, however, strongly revised for the demo release. Uplink also includes the same Hazard Course from the full release of Half-Life. It was also included on "Official PlayStation Magazine Disc 57" as a bonus unlock if you entered a cheat into the PS2 version of Half-Life and swapped the discs.

Originally, Gunman Chronicles was developed by Rewolf Software as a mod for the first person shooter Half Life; after negotiations Sierra released it as a retail version in 2000. In Gunman Chronicles, the general of the Gunmen fell in battle with the Xenomes, a strange alien species which suddenly appeared on the planet Banzure Prime. Now, a mysterious presence has tinkered with the DNA of these Xenomes, making them bigger and stronger than ever before, and the scourge is spreading once again. As Major Archer, leader of the Gunmen, the only law in this area of the galaxy, you must set things right - find the source of this hostile invasion, and clear these alien scum from the rim of the galaxy!

Enlist in an intense brand of Axis vs. Allied teamplay set in the WWII European Theatre of Operations. Players assume the role of light/assault/heavy infantry, sniper or machine-gunner class, each with a unique arsenal of historical weaponry at their disposal. Missions are based on key historical operations. And, as war rages, players must work together with their squad to accomplish a variety of mission-specific objectives.

With its extensive Tour of Duty campaign, a near-limitless number of skirmish modes, updates and new content for Counter-Strike's award-winning multiplayer game play, plus over 12 bonus single player missions, Counter-Strike: Condition Zero is a tremendous offering of single and multiplayer content.

Half-Life: Blue Shift is an expansion pack for Valve Software's science fiction first-person shooter video game Half-Life. The game was developed by Gearbox Software with Valve Corporation and published by Sierra Entertainment on June 12, 2001. (It was originally set for release in Spring.) Blue Shift is the second expansion for Half-Life, originally intended as part of a Dreamcast version of the original game. Although the Dreamcast port was later cancelled, the PC version continued development and was released as a standalone product. The game was released on Steam on August 24, 2005.

Enjoy fast-paced multiplayer gaming with Deathmatch Classic. Valve's tribute to the work of id software, DMC invites players to grab their rocket launchers and put their reflexes to the test in a collection of futuristic settings.

C.A.G.E.D. is an explosive prison escape adventure! Break-out and battle your way to freedom in this electrifying modification for Half-Life.

A futuristic action game that challenges your agility as well as your aim, Ricochet features one-on-one and team matches played in a variety of futuristic battle arenas.

One of the most popular online action games of all time, Team Fortress Classic features over nine character classes -- from Medic to Spy to Demolition Man -- enlisted in a unique style of online team warfare. Each character class possesses unique weapons, items, and abilities, as teams compete online in a variety of game play modes.

Half-Life: Decay is an expansion pack for Valve Software's science fiction, first-person shooter video game Half-Life. Developed by Gearbox Software and published by Sierra Entertainment, Decay was released as part of the PlayStation 2 version of Half-Life. It is the third expansion pack for Half-Life, and like its predecessors, Decay returns to the setting and timeline of the original story, albeit portraying the story from the viewpoint of a different set of protagonists: two scientists working in the Black Mesa Research Facility. Decay is a cooperative multiplayer game, designed to be played by two people working together to pass through the game's levels. In September 2008, a group of Ukrainian developers unofficially ported the game to Windows as a modification of the PC version of Half-Life.

Being a standalone game, Deleted Scenes is a collection of 12 single player missions that came as a bonus with Counter-Strike: Condition Zero. The missions are not connected with each other, but every of them share the same theme: terrorism and warfare.

The PC version of James Bond 007: Nightfire was developed by Gearbox Software while Eurocom developed the home console version. It is mostly the same except for the removal of driving sections used in home console versions and some other minor modifications to the single player and multiplayer modes.

A Half-Life Total Conversion set in the Half-Life universe. You are a Scientist, Candidate Twelve, On your way to work at an unspecified location for unspecified duties. I think you know the rest...

The Wastes is an open world multiplayer FPS taking place in a post apocalyptic world.

Counter-Strike Nexon is a Free to Play MMOFPS offering competitive PvP and PvE action including content from the original Counter-Strike and all new game modes, map creation function, weapons, and hordes of Zombies!

Sweet Half-Life is a single player science fiction and Manga-based Mod of Valve's first-person shooter Half-Life, set at a similar time to the original game and following a similar storyline. It is played through the eyes of Gordon McGinley, and follows his plight to escape from the crumbling Black Mesa Research Facility. It includes 3 new weapons and 5 new enemies.

The action takes place in a scientific complex, which is located somewhere in the Arctic. In the caves, scientists have found a new form of life, which is resistant to frost and incredibly aggressive to intrusion. The staff at the complex do not have sufficient means to counter it. As a consequence they are forced to ask for help from the military, but the military, apparently, have their own plans for the incident.

Invasion is a singleplayer modification of the famous game Half-Life. But a lot of innovations have been added. Among the most important new features, there are 44 maps, 12 new weapons (infrared gun, flame thrower etc), 2 new human enemies, a tank that you can drive, an entirely renewed protective suit and multiple subtitles.