The aliens have decided to take over Earth. A few centuries they were watching the measured people's lives and suffered an invasion of their own planet, but now they have decided to sweep away all humanity from the face of the earth. Government shocked by this turn of events, and decides to seek help from a brave hero Ben 10. Switch between Swampfire's fireballs, Gwen's shield and Kevin's absorbing powers to fend off the Forever Knights in Forever Defense.

Left and Right arrow keys to move. Z to attack. X to jump. Up arrow key + Z to upper cut. Down arrow keys + Z to tackle. Space bar to perform super attack.