Aliens

"We regret to inform you that the Earth has been demolished." Coming next—a "Human Observation Documentary" starring "Landmine Girl"(fake) and "Nerd" (so-called).

Infinifactory is a sandbox puzzle game by Zachtronics, the creators of SpaceChem and Infiniminer. Build factories that assemble products for your alien overlords, and try not to die in the process.

Relive Half-Life.

Three years after the Necromorph infestation aboard the USS Ishimura, Isaac Clarke awakens from a coma, confused, disoriented, and on a space station called The Sprawl. Explore this world and its zero-g environments to discover the truth about the Unitology and its role in the Necromorph epidemic.

Co-operative top-down shooter game available for free. An epic bug hunt featuring a unique blend of co-op play and squad-level tactics.

Co-operative multiplayer game and complete code base available for free.

Species: Unknown is a 1 to 4 players co-op survival horror. Complete high-risk missions aboard an abandoned ship while being hunted by an unknown creature. Survive and upgrade your gear to face each new threat that lurks in the dark.

Mission: Translate an interstellar message, using the universal languages of math & science.

A hand-drawn tribute to hilarious '90s adventure games (with none of the accompanying frustration). Play as Joey Claire, a puzzle-solving teen snatched out of her time (1994) and place (Earth) and stranded on a hostile alien planet on the brink of rebellion.

Command a team of 5 elite soldiers against an alien horde of 100,000. Surrounded on all sides, you must outmaneuver and outsmart the enemy.

Charlie in the Moistverse of madness is a small fangame made to celebrate the amazing Moistverse meme that took the world by storm. Feel the power of screaming "YEAA BABY" from the top of your lungs to put fear on your enemie's hearts. This game truly makes you feel.. like Critical.

The XCOM: Enemy Unknown - Slingshot Pack is Now Available!