Simon Wolfe of Capsule Computers writes:
"Ben 10: Ultimate Alien is the most recent series in the Ben 10 television series’, having ended in March of 2012. Featuring a 16 year old Ben Tennyson, the series sees Ben with an improved Omnitrix, called the Ultimatrix, as well as becoming known worldwide for his power and abilities. Becoming known for being a superhero has it’s downsides though as Ben continues to face bigger threats, but also gains the ability to use improved Ultimate forms of some of his alien forms.
Ben 10: Ultimate Alien – Ultimate Alien Rescue is an online flash game made for the series and is available on the Cartoon Network website. As with most flash games based on a series, it attempts to fit into the story of the series or is based on one or more episodes."