AlienAssault

A race of Syntharians, survivors of the death of their star system, attack Earth in an attempt to inhabit a new home. A military base becomes the first obstacle in their path, and the player must lead a desperate defense to prevent the takeover. The player will have to uncover the secrets of the Syntharians and confront their army in order to prevent disaster.
The game has two modes:
-A plot one where you have to confront an army of Syntharians in order to prevent a catastrophe from happening
-Arena one where you need to fight off crowds of enemies, performing additional tasks and conditions