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.

Metal Gear Solid 4: Guns of the Patriots is a tactical espionage action game set in a futuristic battlefield. It follows an aging and exhausted Solid Snake who is equipped with OctoCamo, a high-tech suit that dynamically changes its texture to help him blend into his surroundings. This allows him to stalk his enemies like never before. The game features several characters from previous Metal Gear Solid games including Revolver Ocelot, Meryl Silverburgh, Naomi Hunter and Raiden as well as an unforgettable story depicting the desperate state of the future through the eyes of an older Solid Snake.

Halo: The Master Chief Collection is a compilation of the Halo games featuring the complete story of the Master Chief playable on one console. It includes remastered versions of Halo 2: Anniversary, Halo: Combat Evolved Anniversary, Halo 3 and Halo 4, along with new digital series such as 'Halo Nightfall' and access to the beta release of 'Halo 5 Guardians'.

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.

Gears of War 2 is a next-generation video game that builds upon the gameplay of the first title in every way. It features new characters, weapons, enemies, vehicles and locales to offer more action, emotion and thrills. Visual effects have been enhanced with ambient occlusion, dynamic shadows, improved character lighting and hundreds of on-screen characters rendering simultaneously. The story follows humanity's epic battle for survival through multiple story arcs that introduce new characters and explore familiar ones with an in-game conversational camera system which brings the cinematic story to life. This combined with its sweeping vistas make Gears of War 2 one of the most gorgeous games available this generation.

Halo: Combat Evolved is a sci-fi first person shooter game set in an alien world shaped like a ring. Players take on the role of Master Chief, mankind's super soldier, and must combat the attacking Covenant forces. Missions involve battling enemies on foot and in vehicles with human and alien weapons, raiding underground labs for advanced technology, rescuing comrades, and sniping enemy forces. The game also allows up to four players to battle each other via split screen or team up cooperatively through single-player missions.

Alan Wake is a psychological action thriller, set in an idyllic all-American small town and its surrounding areas in the state of Washington. The protagonist, Alan Wake, is a bestselling horror writer who must confront his own nightmares come to life. Remedy Entertainment's focus on story and atmosphere are fundamental elements of the game design which allows players to explore an open world environment. There is also a mission based structure with light being used as a significant gameplay element that was created through proprietary new technology for high definition visuals.

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.

In XIII, the player takes on the role of a mysterious figure who has been framed for the assassination of the President of the United States. With no memory and a bullet wound in their head, they must use all available resources to uncover a dark conspiracy behind this heinous act. Armed with silent crossbows, automatic weapons, and ashtrays, they must evade or use assailants eager to end their life as human shields while also competing against other players in multiplayer modes like Barfight or co-op mode Cover Me. Ultimately, it is up to them to expose both their own past and America's darkest secrets hidden within its corridors of power.

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.

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.

Warhammer 40,000: Space Marine is a game set in the Games Workshop's science fiction universe of Warhammer 40,000. In this dark future, humanity faces extinction from horrific aliens and demonic hordes. Players play as one of the superhuman Space Marines who are humanity's only hope for salvation. The game features intense Action-RPG battles where players take direct control of the Space Marine to fight against these powerful enemies. With only war in the grim darkness of the far future, it will be up to you to save humanity!

Halo 5: Guardians is a science-fiction first-person shooter video game set in the year 2558, where human colonies across the galaxy have been unexpectedly attacked. To make matters worse, humanity's greatest hero and legendary Spartan warrior - Master Chief - has gone missing. It is now up to a new Spartan to hunt down Master Chief and uncover an unknown mystery that threatens all of mankind.

Counter-Strike: Condition Zero (CS:CZ) is a tactical action video game that requires players to compete with and against AI opponents in mission-based campaigns located around the world. As leader of an elite counter-terrorist unit, players must complete over 20 new missions which include rescuing hostages, escorting VIPs to safety, and locating and defusing bombs. This game uses advanced technologies such as detailed models, atmospheric enhancements like snow or rain, and other dynamic special effects powered by an enriched Half-Life engine. CS:CZ advances the award-winning Counter Strike series by introducing single-player action and online play enhancements for more strategic gameplay.

Battlefield Heroes is a free-to-play game from Electronic Arts, the company behind multi-million selling Battlefield 1942 and Battlefield 2. It is an accessible shooter set in a cartoon-style world that can be enjoyed by players of all skill levels. Players will be able to choose their character and customize them as they progress through the game, earning rewards along the way. The game offers fast paced action with easy to learn controls, creating an enjoyable experience for everyone involved.

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.

Halo 3: ODST is a video game that returns players to familiar ground on a vital, top-secret mission. The story follows the legendary Orbital Drop Shock Troopers (ODST) as they drop into the ruined city of New Mombasa in search for clues behind the Covenant's devastating attack. Players take control of new characters and get to experience their courage and valor first hand while trying to uncover the truth. Halo 3 multiplayer features will also be included such as full integration with Forge map editor.

Battlefield Vietnam is a first-person shooter video game that takes place during the Vietnam War. Players can choose to play as either the United States or North Vietnamese Army (NVA) and use modernized weaponry and vehicles, including helicopters, tanks, and fighter jets. There are various characters within different soldier classes for players to command in battle scenarios such as leading an attack on an enemy compound or ambushing soldiers from dense foliage. The game features intense combat across diverse locations like villages on the Ho Chi Minh Trail to city streets of Hue. Players must arm themselves with M-16s and Napalm before entering some of the fiercest battles of the Vietnam War.