Sci-Fi

Sci-Fi themed games are games that are characteristic of science fiction literature; the narrative is dependent on the impact of scientific discoveries that do not yet exist in reality. Some games, such as those in the Half-Life series and Unreal series take place in a sci-fi universe that was created specifically for the purpose of the games. Others may take place in existing sci-fi universes, such as licensed Star Wars games. Common elements of sci-fi themed games include futuristic settings, high-tech items and weapons, and alien characters.

Aliens Versus Predator 2: Gold Edition

Aliens versus Predator 2 is a video game developed by Monolith Productions and published by Sierra Entertainment, which was released through Fox Interactive in 2001. The game is a sequel to Aliens versus Predator, which is based loosely on the movies of the Alien and Predator series.

This Gold Edition combines Aliens Versus Predator 2 and its expansion pack, Primal Hunt, into one package.

Shadow Warrior 2

Shadow Warrior 2 is the stunning evolution of Flying Wild Hog’s offbeat first-person shooter following the further misadventures of former corporate shogun Lo Wang. Now surviving as a reclusive mercenary on the edge of a corrupted world, the formidable warrior must again wield a devastating combination of guns, blades, magic and wit to strike down the demonic legions overwhelming the world.

Osiris: New Dawn

The year is 2046 and mankind’s discovery of near-lightspeed fold engine propulsion has empowered mankind's Osiris expeditionary missions to the Gliese 581 system. You are the second colonization team sent by the U.N.E. (United Nations of Earth) to study potential habitable planets when your spacecraft malfunctions braking from light speed, forcing an emergency landing on the planet’s surface.

The Turing Test

The Turing Test is a first person puzzler from the developers of ‘Pneuma: Breath of Life’ that explores the phenomena of consciousness and challenges the meaning of human intuition. Take control of Ava Turing, an engineer for the International Space Agency (ISA), and progress through a narrated story of introspection and morality whilst uncovering the hidden mysteries of Europa. Delve into The Turing Test’s human interaction puzzles and arm yourself with logical and methodical thinking. Take on tests designed in such a way that only a human could solve them.

Alert: Sector 8

"WARNING! Virus has been detected in SECTOR 8 training sim. You need to immediately go into the system and while engaging the simulation, destroy the virus as you encounter it growing stronger. This will not be easy as you pass through the waves of the virus attacking and trying to infiltrate the major systems in the training area." - store page description

BlackSite: Area 51

Blacksite is a fairly run of the mill FPS game by Midway - its about aliens , i think.

Deus Ex: Mankind Divided

Deus Ex: Mankind Divided is a cyberpunk-themed action role-playing stealth video game developed by Eidos Montreal and published by Square Enix. Set two years after Human Revolution, Mankind Divided features the return of Adam Jensen from the previous game, Deus Ex: Human Revolution, with new technology and body augmentations.
Quote: Wikipedia

Area 51

Area 51 is a first person shooter, played from the perspective of the protagonist, Ethan Cole. The game does feature some operable machinery, including plasma turrets, besides the player's inventory of weapons. The player begins with a team of three other HAZMAT soldiers, who cannot be killed by the game world, unless it is scripted into the story.

The Game is free now see Link --> https://web.archive.org/web/20120409193223/http://extcamp.doublefusion…

Abzû

Gesundheit, little diver. Explore an otherworldly place populated with familiar marine species, master swimming tricks and lose yourself in the ecosystem in this contemplative adventure.

Incoming Forces

Sequel to Incoming. Fight on the side of the aliens against the human forces.