Best sci-fi games for free download by popularity

Set in a futuristic sci-fi world you can play the classic mahjongg rules or one of many new variants including two

player competitive modes or Space Mahjongg.

Help! Aliens! is our new 3D action adventure game for your PC, laptop, notepad or netbook set on an alien spaceship. You are a secret agent sent to rescue the President from the invaders. Your mission is simple: Kill them all!!!

The game is a kill'em all arcade shooter with skins support and screensaver features. In this game you will act as a defender of an "energium" quarry. Using a plasma gun and rocket launcher you should destroy as many planes of your enemy as possible.

Coloring book software filled with 50 pages of airplanes and other things that fly. Published by Dataware.

DarkSide is a sci-fi based shoot'em'up in which you pilot your way around 100's of massive asteroids. Fly in and out of their dark sides as you battle a host of alien hostiles. Watch out for orbiting chunks of rock!

Massive Assault Network is a 3D strategy game based on original Secret Allies concept, where two rival sides struggle for global domination in sci-fi environment. Lead your divisions, fleets and air squadrons to crush your enemies with no mercy!

Massive Assault Network 2: a 3D strategy game based on an original Secret Allies concept. Rivals struggle for domination in a sci-fi environment. Are you smart enough? Lead your divisions, fleets and air squadrons to crush the enemies with no mercy!

From the window of the cockpit of your ship, you survey the planet as you fly swiftly between the buildings, around and over the mountains, and through the valleys destroying the enemy ships which have invaded your childhood home of Pangea. Armed wit

Control a space empire and its powerful fleet. Resources macro-management and detailed turnbased wargame battles put together to create one of the most detailed, yet fun to play, strategy sci-fi games.

The GDN is a combination of fast paced shooter and rhythm action game with an intriguing sci-fi plot spread evenly throughout.

Rally your army against the invading robots and experience the thrill of intergalactic warfare in this exciting new tower defense game!

Dr. Goodwin's miracle cure is once again under threat in this haunting hidden object adventure!

Board the shuttle and embark on a space exploration adventure like no other in an exciting new time management game!

Lifeline is a playable, branching story of survival against all odds! Help Taylor make life or death decisions, and face the consequences together. Or see what happens when you make a different choice.

In a sci-fi, high-flying Shooter game, you must use the enemy's own technology against them to save all of mankind.

Board the shuttle and embark on a space exploration adventure like no other in an exciting new time management game!

Two human factions are at war, and Rick’s best friend and girlfriend have been captured in the turmoil! Can Rick save Vanessa and Yuki before it’s too late?

Your daughter’s uncanny gift draws the attention of a sinister organization!

As Sara tries to find a miracle cure for her ailing brother, she unravels the dark events of her own past.

Venture beyond time and space in this classic adventure game that will take you out of this world!