Air Hunter
Yet another horizontal scroll shooter, you say? No way! While we have nothing against scroll shooters, here we have a sample of a completely different genre. Scroll shooters merely require your reflexes: left-right-up-down and shoot. You exterminate hordes of enemies with tons of ammo. ... Air Hunter from CatchyGames looks like a horizontal shooter game in general but the game play differs and requires you to think strategically. ... Your missions require the destruction of various objects: aircraft guns, buildings, tanks (etc.
http://www.catchygames.com/ahsetup.exe - 5Mb - Download - Screenshot

Als Home
Speed, strategy and combination are demanded in this Comic Shooter. In a research station under water you meet funny small monsters, which you have to catch. In the bonus levels of AL's Home expect you then further challenges. Al's Home is a combined Comic Sidedescroll Shooter with an unusual...
http://www.mumbo.de/download/alshome/en/setup.exe - 2Mb - Download - Screenshot

DemonStar - Classic
The most thrilling vertical scrolling shooter on the market! DemonStar takes shooters to the extreme with Multiplayer/Network capabilities, Force Feedback joystick support, 3-D rendered graphics, explosive sound effects, and a brilliant soundtrack. Do you want fast-paced, reflex-jerking,... As you maneuver your way through each of the 18 progressive levels, you can build up an arsenal worthy of a match against the greatest mega-boss of all time: THE DEMONSTAR. ... To destroy each boss, you will have to search for the many weapons such as lasers, homing missiles, and many more.
ftp://ftp.mking.com/pub/demonstar/demonshr.exe - 4Mb - Download - Screenshot

Alien Outbreak
Are you ready for some serious action? AlienOutbreak is the most addictive space shooter in the entire solar system. And very well may be in all other galaxies as well (we? ll find out as soon as we make the first real contact with the aliens). The game sucks in immediately and does not let go... shooters. ... kill them all? ... This makes the gameplay much more dynamic and engaging. ... And the original soundtrack that comes with the game features five catchy themes that are sure to become instant hits.
http://www.beegames.com/alienoutbreak.exe - 3Mb - Download - Screenshot

Doomed
A doom-like 3-dimensional first person shooter.
http://users.pandora.be/sikeske/game/doomed.zip - 5Mb - Download - Screenshot

Asteroid ES
Arcade Style Space Shooter
http://members.gamedev.net/battleline/asteroid_es_0_80_01.exe - 4Mb - Download - Screenshot

Clash N Slash
Enjoy non-stop action space shooter with extremely simple controls suitable for all ages! Clash'N Slash, a totally new and highly addictive arcade space shooter for players who want to enjoy a fresh exciting gameplay and bored with playing tons of indistinguishable shooter games. ... Loads of weapons, upgrades, enemies will hold you for a long time and innovative bonus triggering system will make your game experience colorful and fun. ... With superior firepower and enhanced spaceship capabilities that can be upgraded from time to time and ability to build structures on your homeplanet to...
http://www.enkord.com/download/clash_n_slash_111.exe - 5Mb - Download - Screenshot

Gunstorm
Gunstorm is a single screen space shooter. Mouse or keyboard controlled, Gunstorm is a top down arcade game where the player must ascend through ever-changing levels of alien waves, meeting different guardians along the way. Several game types are available, including a superb Asteroids inspired... Fully 3D and using the Cornutopia Hector graphics engine, Gunstorm represents the most advanced game in a series of releated shooter titles stretching back to 1992. ... Different weapons and enemy combinations, and different level types and guardians have all been extensively adjusted to make...
http://www.cornutopia.co.uk/software/taskforcesetup.exe - 3Mb - Download - Screenshot

Desperate space
Experience huge battles in a brand new breed of addictive, asteroids style space shooter. Desperate Space takes the genre to exciting new levels with its team based gameplay and focus on saving lost civilian ships. Unlike other shooters, this game will deliver non stop action, whilst still... If all that isn't enough for you there is the chance to for you to compete with with players all around the world in our online highscore charts. ... See how good you really are! ... Desperate Space is quite simply a stunning asteroids style game, that will keep you playing for weeks on end!
http://www.jaggedbladesoft.com/desperate/DesperateDemo.exe - 8Mb - Download - Screenshot

Asteroid F
Asteroids collide and aliens attack out of no where firing indiscriminately in this free arcade style space shooter game for the PC.
http://www.freewareshareware.net/download/af.exe - 1Mb - Download - Screenshot