Half-Life 2 is a first person shooter video game released in 2004 and was named Metacritic's PC Game of the Year. The player takes control of Gordon Freeman, a research scientist who must save Earth from alien forces that were unleashed during an incident at Black Mesa. In this immersive world, the player's presence has an effect on their environment as well as the behavior and emotions of enemies and allies alike. With exciting suspenseful gameplay and stunning realism, Half-Life 2 offers an unforgettable experience to all players as they strive to rescue humanity from its impending doom.

Black Mesa is a re-envisioning of Valve Software's classic game Half-Life. Players will experience the journey of Gordon Freeman through the Black Mesa Research Facility with enhanced visuals, music, voice acting and dialogue for an immersive experience. There are detailed environments to explore as well as a large cast of characters and experimental weaponry to use in this updated version of Half-Life.

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.

Half-Life 2: Episode Two is the second installment in Valve's award-winning Half-Life trilogy. Players take on the role of Dr. Gordon Freeman as he travels with Alyx Vance to deliver a crucial information packet stolen from the Citadel to an enclave of resistance scientists. Along the way, they must battle and race against Combine forces while navigating White Forest. The game offers unique weapons, vehicles, and creatures that extend the gameplay found in its predecessor.

Space Invaders Extreme 2 is a fast-paced arcade game developed by Square Enix. Players control cannons to shoot and attack waves of enemy Invaders, with the goal of staving off their assault before they run out of stock cannons. After defeating all the Invaders on screen, players must then face down a powerful Boss in order to move on to the next stage. But if they lose all their stock cannons it will be Game Over!

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'.

Halo: Reach is an epic video game set in a massive and awe-inspiring environment. Players take on the role of Noble Team, a squad of heroic Spartan soldiers, as they fight to protect humanity's last line of defense against the Covenant. The game has darker visuals than previous Halo games and uses an all-new engine to render characters, enemies and environments with incredible detail. The story follows this brave team during their final stand on planet Reach, allowing players to experience the fateful moments that forged the Halo legend.

Halo 2 is a first-person shooter video game developed by Bungie and published by Microsoft Game Studios. The game follows the story of Master Chief, a genetically enhanced supersoldier tasked with defending humanity against the Covenant alien race. Players can interact with their environment, wield two weapons at once, board enemies' vehicles, and switch sides to play as a Covenant Elite. Halo 2 also features new vehicles, weapons, environments and supports Xbox Live for broadband multiplayer action.

Half-Life 2: Episode One is an all-new episode created by Valve that continues the Half-Life 2 single player adventure. Players take on the role of Dr. Gordon Freeman, who must face the consequences of his actions in City 17 and the Citadel. Along with Alyx Vance and her robot Dog, players join forces with the resistance to battle against Combine forces. Through this thrilling adventure, players will experience a gripping story line filled with intense action and immersive environments.

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.

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!

XCOM: Enemy Unknown is a video game from the makers of the Civilization series about humanity's fight against an unknown enemy. The governments of Earth have joined forces to form XCOM, a secret paramilitary organization tasked with defending the planet from extraterrestrial invasion. Players will be put in command of XCOM and must build and manage their base, research alien technology, plan combat missions and direct soldiers in battle in order to save mankind.

Contra is a classic action video game developed by Konami in 1987. Players take on the role of two commandos, Lance and Bill, tasked with infiltrating the base of Red Falcon organization to prevent them from conquering Earth. As they progress through 8 stages set in the jungle, players are armed with a machine gun and can capture upgraded weapons such as Fireball, Laser, Rapid Fire gun or Spread Gun to defeat enemies along their way. Ultimately it is up to Lance and Bill to save the world from Red Falcon’s plans for global domination.

In MDK2, Kurt Hectic returns to save the universe from an alien menace with the help of his new companions, Dr. Hawkins and Max the robotic dog. Armed with unique weapons such as the Black Hole Grenade and Sniper Shield, players must battle their way through levels filled with enemies in order to save humanity. With Interplay's signature mix of platforming and shooter action, MDK2 is sure to provide hours of entertainment for gamers.

Crysis is a next-generation PC first-person shooter developed by Crytek, the award-winning developers of Far Cry. In 2020, global tensions have reached their peak when North Korea seizes an area in the South China Sea where U.S archeologists uncovered a mysterious artifact. The U.S dispatches Delta Force operatives to rescue the team and uncover the true nature of this artifact which reveals an alien presence on Earth - triggering a massive invasion! Gamers will now take up arms against aliens with customizable weapons and a Nanosuit that allows them to adapt quickly to hostile environments and enemy tactics. It's time for gamers to join forces to save Earth from this alien threat!

Gears of War is a video game that combines tactical action with survival horror. Players take on the role of Marcus Fenix, a war hero leading his fire team in an epic battle against the Locust Horde, a nightmarish race of creatures from beneath the planet's surface. With real-time lip synching and voice recognition for heightened immersion, gamers can use blindfire, cover and weapons to outwit their enemies in interactive environments powered by Unreal Engine 3 visuals. A.I teammates are indistinguishable from human players as they work together to survive this harrowing story of war and survival.

Earth Defense Force 2025 is the latest installment in a long-running series from Japanese developer Sandlot. The game follows humanity's struggle against an army of giant, alien insects hellbent on wiping out mankind. As they fight to save Earth, players will take part in over-the-top action and city-leveling explosions that push the EDF and citizens of Earth into a desperate battle for survival.

Solar 2 is an exciting open-world, sandbox game set in an infinite abstract universe. Players can choose to play constructively by growing their system, nurturing life on their planets and attacking enemy life in huge space battles or destructively by crashing into other objects and causing chaos. Unique features of this game include the dynamic abstract sandbox universe which changes as players progress through it, non-linear missions and open-world gameplay with no boundaries and a full soundtrack of weird humor and eccentric stuff.

Incredible Crisis is a funny and intense video game where you must help Taneo's family get home in time for Grandma's Birthday. You will be tested mentally and physically as your reflexes are put to the test with hundreds of hilarious yet heart-stopping dilemmas. The controls are easy to use, but there is still risk of injury. This game can cause serious fun that may lead to more serious side effects, such as obsessive compulsive behavior, nervous disorders or involuntary twitches.

Robot Alchemic Drive is an action video game developed by Enix where players have the opportunity to control a 75 ton high-tensile robot in realistic urban environments. As they move through these crowded spaces, they will engage in intense hand-to-hand combat with colossal opponents using missiles, lasers, shooting fists and boomerangs among other weapons. Players must also use their giant robots as tools to complete missions and defeat enemies. The game offers an immersive experience that accurately simulates the operation of a remote-controlled metal titan in dynamic settings.

Supreme Commander: Forged Alliance is the latest installment in the critically acclaimed Supreme Commander franchise. The game picks up after the Infinite War, and introduces a whole new single-player campaign, a brand new faction, and plenty of innovative multiplayer features. Players will have access to more than one hundred different units including naval forces, orbital weaponry, and advanced counter intelligence technologies for an enhanced strategic experience.

Contra 4 is a 2D side-scrolling video game set two years after Contra III: The Alien Wars. Players take control of Bill and Lance as they team up to fight an alien invasion led by Black Viper. The game retains the classic style of gameplay from earlier titles, with players using futuristic weapons to battle aliens while avoiding hazards. One notable feature exclusive to Contra 4 is its use of both screens on the DS, allowing for larger environments and boss encounters. Additionally, it maintains the traditional two-player simultaneous play mode that has become a staple of the series.

Alien Front Online is a classic tank shooter game where players join either the human or alien faction in an all-out battle for global domination. Players take control of powerful tanks and fight against each other to defend their side while using advanced weaponry to obliterate their enemies. The Triclops aliens have invaded Earth with the goal of wiping out humanity, so it's up to players on both sides to decide the fate of our planet!

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.

In Crysis Warhead, players take on the role of Sergeant Sykes, or 'Psycho', a memorable character from the original game. Psycho's Nanosuit is just as capable and he has an even bigger arsenal of customizable weapons and vehicles. Players experience Psycho's parallel story during the events of the original game and find that life on the other side of the island is intense and explosive. Along with this new single player campaign, there are also new multiplayer content to enjoy!

Resistance 2 is a video game that continues the fight against the Chimera invasion of Europe. Players take on the role of Sgt. Nathan Hale, who must defend mankind from this unstoppable enemy while fighting off a virus inside his own body that threatens to transform him into them. Powered by Insomniac Games' third-generation PS3 technology, Resistance 2 features an eight-player co-op campaign and 60-player online competitive multiplayer. There is also an epic single-player campaign with new weapons and giant boss encounters that increase the scale of conflict to new heights, as well as community support for players.

In Destroy All Humans!, you take on the role of an alien intent on taking over humanity. You will have access to a UFO, as well as advanced weaponry and special abilities. With weapons like the Ion Detonator, Zap-O-Matic, Sonic Boom or Quantum Deconstructor at your disposal, you will terrorize humans both in the air and on land. This is your chance to experience what it's like to be part of an alien invasion!

Anarchy Online: Alien Invasion is an online sci-fi video game developed by Funcom. It follows the story of a planet called Rubi-Ka which is suddenly invaded by alien forces. Players can join together to defend their cities, as well as fight their way into enemy spaceships in order to gain rewards and increase their power. With intense battles and thrilling rewards, Anarchy Online: Alien Invasion promises an exciting gaming experience for all players.

Anomaly: Warzone Earth is an exciting video game that combines fast-paced action and tactical battlefield command. Players take control of a military convoy and fight back against mysterious alien war machines that have invaded major cities. The player's role is to support the armor squad by plotting each turn from a top-down tactical view. As they progress through the story campaign and challenge modes, players will unlock upgrades and new units to create their ultimate destruction squad.

Destroy All Humans! 2 is a irreverent Sci-Fi action game set in the swinging sixties. Players take on the role of Furon Scout Crypto 137 as they embark on a mission to earth. With an upgraded arsenal of weapons and enhanced mental abilities, players must battle their way through secret agents, giant creatures, Soviet Forces and ninja warriors. The game features expanded open world gameplay with co-op multiplayer options for increased fun.

Half-Life: Blue Shift is the second expansion pack for the groundbreaking first-person shooter Half-Life. Players take on the role of security guard Barney Calhoun, and must fight to rid Black Mesa compound of any extraterrestrial or misguided soldiers that stand in their way. The game also includes Opposing Force, which was the original expansion pack for Half-Life.

In the video game Phalanx, players assume the role of Rick Sanada, a crack fighter pilot assigned to the PHALANX A-144 spacecraft. Players must battle aliens that are invading Planet Delia and use their multiple weapons systems to do so. The graphics in this arcade shooter are incredibly advanced for its time, providing stunning visuals far beyond what can be expected from portable games.

Xenonauts is a turn-based strategy game set in the Cold War era, where you command a multi-national military organization tasked with defending Earth from an alien invasion. You must strategically deploy small squads of soldiers to battle the extraterrestrials and recover their technology. The goal is to eliminate the aliens and protect humanity from destruction.

Anarchy Online is Funcom's massively multiplayer science-fiction online role-playing game, often compared to Everquest. However, upon its release it was fraught with bugginess and stability issues, prompting some critics to debate whether they should review the game before or after the release of routine patches. Despite this initial criticism, Anarchy Online has gone on to become a successful and beloved sci-fi MMORPG adored by many players around the world.

Earth Defense Force 2017 is an arcade-style third-person shooter game where players are given an extensive arsenal of weapons to defend Earth from extraterrestrial invaders. Players have up to 150 weapon variations, such as assault rifles, rocket launchers and flamethrowers, at their disposal with the support of AI controlled teammates. They can join forces with live teammates in co-op mode or go solo against waves of enemies ranging from gigantic ants and spiders to robots and monsters more than 20 stories tall. The environment is fully destructible meaning bridges, skyscrapers and other structures can be destroyed by friend or foe while trying to save the world or demolish it in the process. With 50 missions available there's plenty of action for players looking for a challenge!

Serious Sam 3: BFE is a first-person shooter video game developed by Croteam. The game is intended to be a throwback to classic shooters of the past, where players can expect intense, fast-paced action with no need for cover or stealth tactics - just aiming and shooting until everything goes boom! Boasting huge levels filled with hordes of enemies waiting around every corner and an arsenal of over-the-top weapons at your disposal, Serious Sam 3: BFE promises an explosive experience that will leave you wanting more.

Earth Defense Force: Insect Armageddon is a game developed by Vicious Cycle that continues the rich history of casual fun and addictive gameplay from Earth Defense Force 2017. Set in the fictional city of New Detroit, up to three players can team up online in Campaign mode to battle insects and aliens across an entirely destructible environment. Every player is armed with over 150 weapons and four upgradeable armor sets while they partake in nonstop arcade action faster than ever before. In Survival mode, six players must take on an endless onslaught of large alien enemies. It's up to the Earth Defense Force to save mankind from this giant bug problem, even if it means blowing up the entire city as part of their extermination process!

Alien Swarm is a free video game that combines cooperative play and squad-level tactics in an epic bug hunt. Players form squads of four IAF Marine classes, and use unlockable weapons with different loadout configurations to fight a variety of aliens. They must battle through environments like icy planets and lava-flooded mining facilities to eradicate the alien infestation. Along with the game comes access to the complete code base for Alien Swarm, which has updates to the Source engine as well as 3rd person camera, depth of field, improved dynamic shadows and other gameplay additions.

Universe at War: Earth Assault is a combat-intensive real-time strategy game developed by Petroglyph. Set in the near future, players must enlist to prevent total alien domination of planet Earth. Featuring numerous features and customization options never before seen in the RTS genre, Universe at War provides an exceptional gaming experience for both single player and multiplayer battles. A unique balance system called Tactical Dynamics allows players to retrain and customize units during battle while fully customizable tech trees control development of technologies key to victory. Battles take place on a global scale with deadly sci-fi weapons and deforming environments that leave lasting effects on previous battlegrounds. Players from around the world battle online campaigns for ultimate supremacy across a virtual representation of the Earth, unlocking achievements, rewards, and medals as they progress through the game.

In C-12: Final Resistance, Lt. Riley Vaghan is tasked with saving the human population from certain extinction as hostile alien forces threaten to ravage the planet and turn survivors into cyborg warriors. Armed with an Alien Imaging Unit that has replaced his left eye, he must rely on a combination of firepower, stealth, intelligence and determination to save humankind from impending doom.

Earth Defense Force 2017 Portable is a remastered version of the popular video game that features seven new levels and the return of fan favorite Pale Wing. Players take control of Pale Wing as they use her jet pack to soar high above buildings and wreak havoc from above. With this upgrade, players can now experience an even more exciting and action-packed journey in defending Earth from alien forces.

Anomaly 2 is an upcoming video game from 11 Bit that is set to be announced on February 28th. It is a sequel to the popular tower offense game, Anomaly Warzone Earth, and will feature improved visuals and new features such as cooperative multiplayer mode. Players take control of a group of four heroes who must battle their way through enemy forces in order to save humanity from an alien threat. The game will also include strategic elements such as resource management, allowing players to customize their squad with various weapons and abilities. Overall, Anomaly 2 looks like it could be an exciting addition to the tower defense genre for fans of the original title or newcomers alike.

In Titan Attacks, the player takes control of a tank commander on Earth who is the last surviving member of their army. The objective is to drive back the invading alien army, known as Titans, across the Solar System and defeat them on their homeworld. This classic shoot 'em up game features 5 unique worlds with 100 levels of frantic action packed full of extras such as new strategies and stylish neo-retro visuals. Players will battle swarms of alien fighters, bombers and giant boss motherships while collecting bounty money to upgrade their ship with extra cannon, rockets and lasers. There are also sharp-shooter challenge stages where players can win prizes and an online Hi-Scores table for competitive play.

AquaNox is an underwater adventure video game developed by Fishtank Interactive. It features over 30 single-player missions, 9 different playerships, 40 enemies including gigantic creatures, a gripping story and detailed world with 70 NPCs, and deathmatch and teambased multiplayer modes. Players get to explore the dangerous deep sea full of adventures while battling various foes throughout their journey.

Call of Duty: Ghosts is a first-person shooter video game that takes place in a world where global power has been permanently redrawn. Players take on the role of members of a surreptitious group known as Ghosts and fight against an emerging, technologically superior global power. The game features over 20 new kill streaks such as Juggernaut Maniac, Helo-Scout, Vulture and the ODIN Strike. Additionally there is also the option to bring in Riley from the single-player campaign as your guard dog to warn you of enemies and attack them if they get too close.

BlackSite: Area 51 is a video game that puts you in the shoes of a decorated military veteran tasked by the government to lead a squadron into Rachel, Nevada to fight off an invading force of unidentified enemy races. The action-packed single-player campaign and multiple online multiplayer modes feature next generation graphics and A.I., as well as powerful weapons and vehicles. In addition, players must grapple with real emotions such as fear and responsibility in order to shape the outcome of this pivotal moment in history.

Godzilla: Destroy All Monsters Melee is an action fighting game where players take control of Godzilla and his many rivals as they battle to determine the fate of Earth. Players can choose from a range of monsters, each with their own physical attributes and special weapons. The battles take place in cities such as Tokyo and San Francisco, featuring realistic destruction and physics. Multiplayer mode allows up to four players to join the fight together.

Shadowgrounds Survivor is a spin-off/sequel to the original Shadowgrounds PC game. It follows the story of three survivors who join forces with the last remaining human resistance in their fight against an alien onslaught. This game brings back much of the atmosphere and gameplay mechanics from its predecessor, but also introduces several new features, such as 3 playable characters with special attacks, a RPG-like upgrade system for weapons and characters, Sentry Turrets and Mechs, campaign mode set in different environments like snow and ice as well as sewers and New Atlantis Colony, Survival Mode where players face hordes of enemies while racing against time; enhanced graphics effects like raging snowstorms; integrated physics that bring destruction to life with hundreds of physical objects.

Resistance: Retribution is a third person action-adventure game set in the weeks after Resistance: Fall of Man. Players take on the role of former British Marine, James Grayson, who goes on a vendetta to destroy Chimeran conversion centers after he is forced to kill his own brother inside one. Eventually Grayson learns that these efforts have been futile and joins forces with European resistance group Maquis in Operation Overstrike as they wage war against the Chimera to retake Europe. The game features over 10 different types of enemies including both familiar Chimera from previous games as well as newer ones like Hag and Cloven. There are also intense 8 player multiplayer modes available via ad-hoc or infrastructure with 5 different game modes such as Team Deathmatch, Capture the Flag, Containment and Assimilation.

The Bureau: XCOM Declassified is a third-person tactical shooter set in 1962 during the Cold War. Players take on the role of special agent William Carter, who leads an elite government unit called The Bureau to investigate and conceal mysterious alien attacks across America. As players progress through this high-stakes covert war, they must survive, adapt and overcome enemy forces to protect citizens from the truth. With John F. Kennedy as President and Heartbreak Ridge-style combat mechanics, The Bureau is a gripping experience full of intense action and strategy that will challenge players every step of the way.