Earth's Greatest Defender is an internet based action game where you have to protect the Earth from an outside invasion and rescue human prisoners! In mission mode, show off your abilities by battling outsiders at different levels. Choose your level of problems and characters, defeat various outsiders and rescue prisoners. Feeling brave? Take on the speed run mode or tackle the unimaginable levels. Unleash your imagination in the level editor to plan your own stages. Need to demonstrate your ability against others? Join multiplayer battles to choose the ultimate defender of Earth! Keep in mind, just the best defender can be due here! Grab your shotgun and start protecting the Earth now.