Setup the ultimate defense against the attacking aliens. Place the Ben 10 aliens as defense turrets and they will begin to automatically shoot at the attacking forces. Upgrade speed, attack and health at the end of each final wave. Ben 10 Games Alien Ultimate Defense is one of our many Strategy Games that we publish on TheGamerStop.com. This game is also tagged as a Ben 10 game. Click the play button to start having fun. To play even more free games, view our popular and new games page. If you want to play more games like this, then you can simply check out the games inside the game tags that are the most relevant to your interests or the Strategy Games category or the games like this game page at the end of the game tags.