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Online Aliens Games
Sol Defender Game

Plays: 2350
Category: Action Games
There is an invasion fleet of aliens moving into the Sol solar system and you are one of the last lines of defense. It is up to you to save the solar system from destruction. Defend Sol from alien attack with your turret battery gun platform!
SteelWasp Game

Plays: 2330
Category: Action Games
Horizontal scrolling shooter, with upgrades and epic bosses.
Planet Blirp Game

Plays: 2328
Category: Action Games
Fight off hoardes of aliens in a blue world as you find your crew mates, fix your ship, and return back to earth! Features a full story, gun upgrades, abilities, achievements, a full story, and also get your crew mates to fight with you! Lots of enemies, guns, and content in this game!
SiwerTran Fight Game

Plays: 2315
Category: Action Games
Tell the aliens you are the law in universe!
Alien Attack Yaytime Game

Plays: 2312
Category: Action Games
Hi! this is my first actual flash game, its a simple sidescroller shoot em up game, fly your ship and destroy the evil aliens!
Prepare For 2012 Game

Plays: 2310
Category: Action Games
Defend against an alien invasion in 2012
CrossFire Madness Game

Plays: 2310
Category: Action Games
Goal Revenge your planet destroyed by the aliens Controls Mouse : Move Your ship Space : Open and Close the upgrade Menu Auto Shooting Features Leveling system to get more starting Gold Able to attach Orbs onto your ship A dozen of stuff to upgrade your equipment and make the battle easier 6 unique Boss Fights Breathtaking gameplay
Click defense: green danger Game

Plays: 2302
Category: Action Games
The story: Somewhere in a distant galaxy an evil emperor leads his green hordes, attacking all planets he can reach. There is only one planet left free and you are going to help it. Gameplay: You need to defend your base in order to survive. Fight (click) green invaders descending from the top of the screen, kill bosses, collect rubbies and use multiple power-ups that enemies drop when destroyed.
Flashavoider Game

Plays: 2292
Category: Action Games
How long can you survive? Avoid the UFO's with your Mouse.
Darkness aliens and space coloring Game

Plays: 2289
Category: Customize Games
Darkness aliens and space coloring Game.
Space Design Game

Plays: 2283
Category: Customize Games
Have you ever wondered what space looked like? Well it doesn't matter! At DressUpWho, you can use your wildest imagination and design your own version space! Use planets, cute aliens, and adorable little astronauts! After you are done, you can save it or print it!
Space's Guardian Game

Plays: 2266
Category: Action Games
Shoot the aliens to defend the space. Grab upgrades to your weapons and health refills.
Tlalorcs Wars Game

Plays: 2256
Category: Action Games
An earthling general has invaded the Tlalorcs' planet, save the planet and destroy the general's base to win this Tlalorcs' Wars
Enmen Game

Plays: 2249
Category: Adventure Games
Aliens have landed on the planet that would take over the world. They disguise themselves as women. You have to pass 3 levels.
Dshield Defender Game

Plays: 2249
Category: Action Games
When aliens come to take over earth, there is one that will stand up to protect us. This hero is Dashieldboyz! With it's powerful shield and it can protect the earth from harm, but for how long? Play more great games at www.dashieldboyz.com.
The Way of the Exploding Cow - Milk Crisis Game

Plays: 2242
Category: Shooting Games
Milk the cows, shoot the aliens trying to steal them. Simple game, gets crazy!
Kill The Aliens Game

Plays: 2240
Category: Action Games
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Aliens Flu Revenge Game

Plays: 2240
Category: Shooting Games
The aliens are stopped and the world is saved. Fifty years later and the Aliens plan Revenge. Will the humans be ready?
Martian Invaders Game

Plays: 2237
Category: Action Games
Our planet has been invaded by Martians who want to dominate us. Do not let this happen, destroy them all.
Missilebreak Outvaders Game

Plays: 2235
Category: Action Games
Defend your cities from alien invaders in this retro blend of three classic arcade games. Our expert team of archaeoludologists has pored over the historical record, piecing together and translating ancient artifacts. We are pleased to finally be able to present a scientifically-accurate reconstruction of one of the very first forms of electronic entertainment, in a playable form for the first time this millennium!

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Tips: For a scope shot game you can go to Gameplay and enable Ghost to remove player/enemy collisions. Use invincible if you don't want enemy fire to hit your scope either.