Half-Life is a critically acclaimed first-person shooter video game developed by Sierra and released in 1998. It has won more than 50 Game of the Year awards from publications around the world, and was named 'Best PC Game Ever' in PC Gamer's November 1999 issue. Half-Life combines great storytelling with intense action and advanced technology to create an immersive experience for players. Set in a frighteningly realistic world, Half-Life requires players to think strategically if they want to survive its challenges and ultimately achieve success.

Unreal Tournament is a fast-paced, competitive first-person shooter video game developed by Epic Games. Players can battle up to 15 friends or customizable bots in over 30 different levels such as pirate ships, waterfronts, speeding trains, and floating castles. Gameplay modes include Capture the Flag, Assault, Domination and Deathmatch variations with an array of enhanced weapons like Impact Hammer that squashes enemies to mush and Redeemer - a rocket powered nuke. With its intense action sequences Unreal Tournament promises an unforgettable gaming experience!

Counter-Strike is a popular video game that modifies the multiplayer aspects of Half-Life, making it more team-oriented and providing players with an experience similar to what a real counter-terrorist or terrorist unit would go through. Players join either the Counter Terrorist team or the Terrorist team as they battle against each other in various mission scenarios. The goal of each round is to eliminate all opposing forces or complete objectives while also managing resources such as ammunition, money and health. With its fast pace and intense gameplay, Counter Strike has become one of the most popular online games today.

Duke Nukem 3D: 20th Anniversary World Tour is a classic first-person shooter game that brings back the beloved hero from 1996. The game follows Duke as he embarks on an action-packed mission to save Earth once again by kicking alien butt and rescuing damsels in distress around the world. Players can enjoy all of the original levels plus 8 new ones, with up to 4 players participating in multiplayer mode. With modern graphics and updated sound effects, this version of Duke Nukem 3D will provide hours of entertainment for fans old and new alike!

Quake III Arena is a fast-paced and intense online multiplayer game that will take players on an exciting journey through cyberspace. Players must be prepared to leave behind their common sense and doubts as they battle against legions of enemies in eerie, dangerous lands. The game tests players' reflexes and gut reactions as they face unpredictable hazards throughout the game. Players must immerse themselves in this thrilling experience if they want to survive.

In Battlefield 2, players take control of one of three military superpowers—the United States, China, or the Middle East Coalition—in massive online battles with over 100 players. The game features destructible environments that adjust in scale based on the number of players in each match and enhanced team play features like Commander Mode. Players increase their rank from recruit to General by achieving success in-game and unlock awards including new weapons, vehicle decals, medals, etc. The game engine and physics system make it feel more realistic than ever before; for example, the material penetration feature measures a weapon's ability to fire through barriers depending on what they are made out of.

Quake is an intense first-person shooter video game from id Software. Players navigate through 32 single player levels and 6 deathmatch levels, all of which feature realistic sound effects and lighting effects to create a fully immersive experience. As they progress through the game, players can arm themselves with various weapons like nails, Thunderbolts, Rocket Launchers and Grenade Launchers in order to defeat enemies such as Ogres, Vores and Schamblers. Quake promises a thrilling gaming adventure that will have you fighting for your life every step of the way.

Counter-Strike: Source is a popular video game from Valve that uses the Source engine. It has recreated maps from Counter-Strike 1.6, such as Office, Havana, Italy, Aztec, Chateau and more with new textures and improved buildings and scenery. Objects in these levels react realistically to the physics engine of the Source engine. The game can be downloaded through Valve's Steam service with Half-Life 2 included in the package.

Shogo: Mobile Armor Division is a revolutionary video game developed by Monolith and powered by their LithTech engine. Players can choose from four different ultra powerful transforming Mobile Combat Armor (MCA) suits, each with its own advantages and strengths. Throughout the deadly outdoor, underground, and city missions you'll be able to find tons of powerups to enhance your MCA's performance as well as dock in certain areas and strike out on foot for objectives. You may even come across some surprises along the way!

Battlefield 1942 is an action-packed first person shooter video game by Electronic Arts. Players are placed in the midst of a raging WWII battlefield and have access to 35 machines of war including vehicles, ships, and aircrafts. Set during some of the most famous battles of World War II, players can storm the beaches of Normandy, drive tanks through northern Africa deserts, pilot fighter planes at Midway or parachute into enemy territory with jeeps. Players must use their weapons and skills to fight against enemies on land, sea and air to win each battle.

Battlefield: Bad Company is an action-packed video game developed by Electronic Arts and powered by Digital Illusions' Frostbite game engine. In this next-generation console title, gamers find themselves behind enemy lines with a squad of renegade soldiers who are out for gold and revenge. The single player experience offers plenty of adventure and dark humor, while the trademark sandbox gameplay allows players to nearly destroy anything in their path. Multiplayer options also abound, featuring deep gameplay modes that make the most of Battlefield: Bad Company's destructible environments.

Killzone 3 is the third installment in the squad-based shooter series developed by SCEA. It is a direct sequel to previous entries in the series and follows on from where Killzone 2 left off. The game features an extensive single-player campaign as well as two different multiplayer modes, Guerrilla Warfare and Warzone. Players will have access to a variety of weapons, vehicles and special abilities that can be used to battle their enemies. The game also includes several new features such as 3D support for an even more immersive experience.

Killzone is a video game set in the future where human colonies have settled many planets, with most of them coming together to form the ISA. However, a separatist faction known as the Helghast has distanced itself and secretly planned an all-out war. The story follows an ISA member trying to escort a high-ranking official to safety when Vekta City’s orbital defense fails and the Helghast deploy their troops rapidly. Drawing inspiration from classical military conflicts of the 20th century, Killzone captures the intense reality of warfare between the ISA and Helghast forces.

Insurgency is an intense, multiplayer and cooperative Source Engine based video game. Players take to the streets for close quarters combat as they battle in teams to secure crucial strongholds and destroy enemy supply. It is a follow-up game to the award-winning Source mod that strikes a balance between one-life gameplay and prolonged action. The game is highly competitive with unforgivingly lethal consequences.

Unreal Tournament III is a first-person shooter game that puts players in the role of a futuristic warrior engaged in intense battles against skilled opponents. The game utilizes Unreal Engine 3 technology to deliver realistic graphics and physics, with bigger and badder weaponry than before. Players can battle against A.I. or human contestants online via Deathmatch, Team Deathmatch, Capture the Flag and Instagib CTF modes, plus an expanded Onslaught mode featuring two sets of vehicles including a Leviathan and Darkwalker. Characters from previous UT games make appearances as well, all with enhanced abilities and personalities.

In Battlefield 2142, players are thrust into a future where an ice age has caused immense panic. They must choose between the European Union and the Pan Asian Coalition in a battle for survival. Players have access to hi-tech weapons, cloaking devices, sentry guns and vehicles such as massive battle mechs and futuristic aircraft. To defeat these behemoths they must rely on their wits and countermeasures like EMP grenades.

In Painkiller, players take on the role of Daniel Garner, a seemingly ordinary man who has just died in a terrible car crash. Stranded in limbo between Heaven and Hell, he must uncover why he is denied access to Heaven while also fending off an army of demon soldiers as they attempt to bring about an unholy war. Players will battle through hordes of enemy forces as they try to figure out what it takes for Daniel Garner's spirit to be purified and gain entry into Heaven.

Quake 4 is a first-person shooter video game developed by id Software and published by Activision. Players take on the role of Matthew Kane, an elite member of Rhino Squad and Earth's invasion force to defeat the alien Strogg race. The game utilizes id Software's revolutionary DOOM 3 technology, allowing players to battle alone or with their squad in hover tanks and mechanized walkers. As they progress through missions, players will eventually be captured and turned into a Strogg themselves with enhanced abilities that allow them to turn the tide of war against them.

Red Faction II is a video game set in the 22nd century on Earth, five years after a rebellion on Mars. The main antagonist, Chancellor Victor Sopot has been ruling over the Commonwealth with an iron fist for 15 years and his oppressive rule combined with an ongoing war against the United Republic has left the country in poverty. Players take control of Alias, a demolitions expert who joins forces with five other super-soldiers to overthrow Sopot's government and restore honor to the Commonwealth. Along their journey they will battle through various environments while using vehicles, specialized weapons and explosives.

Enemy Territory: Quake Wars is an epic online strategic shooter that pits the armies of Earth against invading aliens, the Strogg. Players can choose to battle as one of five unique classes in either the EDF or Strogg armies, each outfitted with specialist weapons and combat hardware. Both sides have access to over 40 conventional and futuristic vehicles as well as deployable structures such as quad-bikes, tanks and alien walkers for ground assaults; or helicopters and anti-gravity ships to lend firepower from the air. Teams establish bases, deploy defense systems into enemy territory while constructing obstacles to gain a tactical advantage over their opponents. Through multi-battle campaigns players strive not only for victory but also gain valuable skills and special rewards for team play along with persistent military promotions and medals.