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.

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!

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.

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.

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.

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.

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 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!

A set of three favorite tapes of the villain Cry of Fear: Epilogue. Learn the Doctor's story during the events of Epilogue in three expansion packs. Explore the burned-out asylum for answers in SINNER, fight in an abandoned hotel in EVICTION and try to stop Jackie in THE MARTYR.

The USS Darkstar mod changed to run under Half-Life: MMod.

You're Alexander Shepard - Corporal and a soldier of the Hazardous Environment Combat Unit. You don't know exactly what's going on. But orders came in to pack up everything and head out for a highly classified mission. The destination - Black Mesa research facility. Nobody knows for sure what has happened down there but you will find out soon enough.

Can you believe your luck? Travelling in a transport plane you get shot down! You survive and things only get worse. Work your way through the area into the base and do whatever you have to do to get picked up. Take you time as the enemy has had plenty of time to prepare for your arrival (not that they were expecting you)

Natural Selection is a change of the video game Half-Life. The concept is a mix of first-person shooter and real-time strategy game genres. The game was made by Charlie "Flayra" Cleveland, who later founded the company Unknown Worlds Entertainment. Natural Selection v1 was publicly released on Halloween 2002 for the first time and is now on version 3.2. Natural Selection 2 was released in autumn 2012.

As Gordon Freeman, you must face down the Administrator for the last time. The Administrator has taken control of "HANGAR 16" a government command and control facility in the desert. From here he is possibly planning a coup against the government of the United States, and vengeance against those who have opposed him in the past. You need to meet with an agent who has the access codes to enter the heavily guarded base, infiltrate it and prepare the way for friendly forces to attack.

By Davide Di Bartolo (Crazy). The story starts where the original Blue-Shift ended: after having saved himself from Black-Mesa together with Rosenberg and the other 2 scientists, something goes wrong and Calhoun is teletransported in the alien dimension for a computer error.... yes I know, isn't very original.... but is just an excuse to put the hands again on the weapons!

Nuclear Winter is a single player mission for Half-Life Opposing Force. It comprises 29 new maps plus a ton of new scripted scenes, models, artwork, character voices, sound effects and music.