Xeno Assault II
Blast aliens and save the universe in an all new sequel to one of the most highly praised games of this year. Xeno Assault II will capture your mind with breath taking game play and heart pounding arcade action the likes of which is rarely seen in a galaga based shooter. ... A Galaga fan's nirvana. ... Find out if your a Boy Scout or an Overlord at the greatest galaga clone ever. ... You won't have seen anything like this in galaga. ... This means you can compete with people all around the world!
http://www.jaggedbladesoft.com/xenoassault2/Xeno2Demo.exe - 7Mb - Download - Screenshot

Warblade
Warblade is a PC arcade shoot'em up game with focus on very good playability. An alien race is invading the earth and you must try to save humanity. That's the simple plot of the game. The game has lots of features like extra bonuses, many secrets to figure out, 2 sub games, shop where you can... Deluxe Galaga was voted in on the TOP 100 GAMES of all time for the Amiga. ... The game is a remake for the PC of my Amiga game Deluxe Galaga. ... Got the Bytten Ernie award 2005 for most addictive game!
http://www.warblade.as/warblade_DEMO.exe - 9Mb - Download - Screenshot

Bugatron
Blast through level after level of menacing bugs with Bugatron, a Direct3D remake of the classic 80's shooting games. But Bugatron isn't just another Galaga clone- it redefines the standards in "retro games" with superb hardware accelerated 3D graphics and fast, addictive gameplay. ... Free version includes 16 full levels. ... Features include 16 levels, 15 powerups, and an amazing soundtrack.
http://www.retro64.com/bugatron.exe - 2Mb - Download - Screenshot

When Icons Attack
Your desktop icons are on a rampage. They have gone wild and are attempting to seize control of the desktop. Only one obstacle stands in there way -- you! This exciting space shooter features over 100 unique levels and rendered graphics. The game plays a bit like space invaders, with some galaga... The icons, of course, have been augmented with powerful weapons of their own, and it will be very challenging to defeat them all. ... Only you can stop the icon invaders. ... Requires DirectX 9. ... 0.
http://www.sb-software.com/wheniconsattack/sbicon11.exe - 3Mb - Download - Screenshot

Star Defender II
Star Defender II is a Space Shooter Arcade. It is developed like an advanced clone of old classic Galaga and possesses all the best features of this genre. Again in this fabulous Shoot'em up game you will get a chance to destroy enormous armies of the cruel invaders and to save the Galaxy! ... 30 absolutely original enemy units won’t definitely let you be bored. ... Each type of enemy has its own model of behavior, weapon and lifetime. ... And you can enjoy all of this for hours being along or together with your friends and family.
http://www.awem.com/download/StarDefender2Setup.exe - 8Mb - Download - Screenshot

AstroRaid
Add one part Space Invaders and one part Galaga, then shake with twist of Asteroids to get AstroRaid, a modern version of an arcade space shooter. The fate of humanity is in your hands! The Earth is in the danger of being destroyed by a fast spreading alien virus that kills anybody it infects. ... Second, unknown forces tried to sabotage your ship launch, but you found the fuel leakage just in time. ... Finally, you found a bomb on board. ... And now this - hordes of UFOs and alien ships are getting more and more fierce as you approach the Earth to save its inhabitant's.
http://www.gamerange.com/files/astroraidinstall.exe - 2Mb - Download - Screenshot

Political Invaders
Your mission, should you choose to accept it, is to plaster as many politicians and their henchmen with pies as you can. The politicians, who don't really like getting blasted in the face with a pie, will drop bombs on you. The bombs will do you great bodily harm, so you would be wise to avoid... The game plays similarly to "Space Invaders" with a touch of galaxian or galaga, and with some fun and unique twists. ... Please don't take offense if we make fun of your particular political heroes. ... In addition to american politicians, you can also choose to pie world leaders if you desire.
http://www.sb-software.com/politicalinvaders/sbpol14.exe - 3Mb - Download - Screenshot