The Flood is a parasitic virulent life form. They are highly virulent and deadly race, and can quickly incapacitate and infect different life forms, but the infected subject must have sufficient body mass and some level of sentience to sustain the infection forms, such as a Human.

The game put you in role of a Humanoid Cyborg, who is the member of Intergalactic security Forces called "The Invincibles".
You must defend the earth and kill all alien infection trying to destroy the earth.
The Floods constantly are teleported to earth from the time vortex of the Cardassien spaceship.

* Experience Sci-Fi Weapons and Powers: It features various sci-fi guns like Photon Gun, Lasers Gun, Phaser gun to freeze and vaporise the enemies, and Black Radion Gun to create artificial black holes to destroy aliens.
-Use Graviton power to kill aliens by quantum gravity waves.
-Use the secret weapon "Time Wrap" to freeze time and kill all aliens at once.
-You will be constantly teleported to new location to give the Sci-Fi feeling.
-Use your weapon management tactics to defend the earth.
* Infinite gameplay: It features in finite gameplay. Kill as many aliens you can. Earn as many coins you can.
* Play in 7 different battlefields: It features 7 different areas, where you must defend the earth against The Flood.
* Experience Console Quality Vector Graphics and Stereo Sounds Experience, well optimised console quality graphics. Feel the realism of game with stereo sounds.
* 8 different character selection: Select from one the 8 members of "The Invicibles" team. It features 4 male and 4 female characters.
* Well optimised and less size: The game is well optimised and is compressed to less size. No more extra pack or expansion file is needed. Just download once and be "The Invincibles"!!!