3D Alien Plasma Tunnels ScreenSaver
Friendly Aliens use different ways to communicate with the human. Alien Plasma Tunnels 3D screensaver is a new alien-assisted technology aimed to inspire us to be even more creative, cheerful, well-wishing and highly successful in our everyday life. While we enjoy the fascinating feeling of...
http://7art-screensavers.com/files/AlienPlasma3DInst.exe - 10Mb - Download - Screenshot

3D Bricks Valley ScreenSaver
Increase the paranormal activity near your PC and rise the overall positivity level with this 3D tunnels screensaver. It features different paradoxical special 3D effects automatically or manually controlled decorated with great bricks textures. 3d alien tunnels series screensavers was... But if you decide to get in touch with the core of that alien project you will find yourself on the strange environment where no human being have ever been before as the mind of the mad profesor is not a simple thing, you will need some assistance of the real aliens in order to get the maximum out from...
http://www.maxysoft.com/files/3DBriksValleyInst.exe - 2Mb - Download - Screenshot

Astrosiege
Astrosiege puts you in control of your own powerful space craft to blast your way through the alien hoards in this classic fast paced arcade shoot-em-up. Destroy dozens of unique 3D accelerated alien fighters and upgrade your weapons with rocket and laser powerups. ... Astrosiege combines popular space shooting action with 3D accelerated graphics and incredible particle effects. ... The free version includes 3 intense campaign levels and the dynamic Marathon mode in 4 different modes of difficulty.
http://www.plowsoft.com/AstrosiegeDemoSetup.exe - 2Mb - Download - Screenshot

3D Alien Clock screensaver
For a long time we used to think that Clock is just a time-measuring tool. At the same time ingenious Alien scientists have been deeply exploring the time phenomenon and finally created Interstellar Time Factory aimed to produce the time of the highest quality. ... It does not really matter what we do or where we go if we are cheerful we do not waste our time. ... All we need is just to live every moment to the fullest extent. ... The Time Factory was launched into space and on June 23, 2006 reached our Solar system.
http://7art-screensavers.com/files/AlienClock3Dinst.exe - 9Mb - Download - Screenshot

Astariel
Can you reach Astariel? Astariel is a fun retro arcade game requiring quick decisions and even faster reflexes. Blast your way through hordes of colourful and frenetic alien attack waves in a battle to reach your home world Astariel. Astariel features a beautiful 3d lighting and an exciting... The game features 40 powerup crates to collect, 5 planets to visit and 150 waves of colourful alien formations to conquer. ... Astariel is an easy-to-play quest for world high score glory that should appeal to a wide audience.
http://www.gibbongames.com/astariel/astariel30d.exe - 5Mb - Download - Screenshot

Bloxter (for Windows)
Bloxter is a fun arcade/puzzle game with 3D graphics, falling blocks and over 30 unique boards. Play in 'Puzzle Mode' with classic gameplay and no distractions, or choose the challenging 'Arcade Mode' featuring bonus lamps and alien monsters. Your job as a bloxter is to produce energy in a block... You may encounter alien life-forms called vaders (Arcade Mode only). ... Drop colored blocks and try to form lines that will react and disappear. ... Bloxter is easy to learn, especially if you have played games like Columns (from Sega) and Tetris (from The Tetris Company).
http://www.norbyte.com/BloxterWin.exe - 2Mb - Download - Screenshot

Bloxter (for Mac OS X)
Bloxter is a fun arcade/puzzle game with 3D graphics, falling blocks and over 30 unique boards. Play in 'Puzzle Mode' with classic gameplay and no distractions, or choose the challenging 'Arcade Mode' featuring bonus lamps and alien monsters. Your job as a bloxter is to produce energy in a block... You may encounter alien life-forms called vaders (Arcade Mode only). ... Drop colored blocks and try to form lines that will react and disappear. ... Bloxter is easy to learn, especially if you have played games like Columns (from Sega) and Tetris (from The Tetris Company).
http://www.norbyte.com/BloxterMac.dmg - 2Mb - Download - Screenshot

Acamar Rising
Acamar Rising is a 3D space shooter where a lone fighter must defend a space station against the many threats of space, from asteroids to aliens. The fighter pilot who defends the station may be lone, but he isn? t without some hefty resources at his disposal. ... Also alien crafts will continuously assault and harass the defenses, along with the occasional mother ship. ... Let too many of these items past and there won? ... t be anywhere to left to dock! ... With four power-ups to be found in asteroids and 8 different weapons to purchase, the defending ship will go from bucket of bolts to...
http://www.beteogames.com/acamar/AcamarSetup.exe - 16Mb - Download - Screenshot

MachineHell
The world has been invaded by an alien race of machine warriors. You are an elite soldier, controlling an advanced military hovercraft. The mission is simple, but tough - search and destroy all the alien Machines and reclaim Earth. Your hovercraft is fully equipped and ready to go. ... - 15 UNIQUE 3D LANDSCAPES AND SURROUNDINGS! ... - TONS OF HIGH DETAILED ENEMY UNITS! ... - VARIOUS WEAPONS, BONUSES AND UPGRADES! ... - POWERFUL SOUND EFFECTS! ... - 200% PURE ACTION! ... - NO BLOOD OR GORE! ... - 15 LARGE LEVELS FULL OF INTENSE COMBAT SITUATIONS!
http://www.machinehell.com/MachineHellDemo.exe - 8Mb - Download - Screenshot

Dino and Aliens
Did you like Shrek or Monsters Inc? Then you will instantly fall in love with Dino and Aliens. Dino and Aliens is a classic arcade adventure that exploits the potential of 3D gaming to its fullest. The graphics is simply spectacular ? smooth movements, cool special effects, great lighting,... This pizzazz 3D game features an amiable animated cartoon-like character Dino, who likes playing his electric piano. ... To pass a level, Dino has to clear the level of aliens and find a key to get to the next one.
http://www.nevosoft.com/dino/dino_demo.exe - 9Mb - Download - Screenshot