Who doesn't heard about Ben 10 - It's famous known series, not only the Games, but the Television Series. I have played all games of Ben 10 -
Ben 10 Omniverse
Ben 10 Ultimate Alien Series
Ben 10 Fighting Games
Ben 10 Super Alien Series
I also have Two Omnitrix Watched at my home, The most amazing Aliens that I liked are - Diamond Head and Wildvine.