NaturalMotion is the creator of Active Character Technology (A.C.T.).

With A.C.T., what you see on the screen is not a computer graphic of the character; it is the character. Unlike conventional approaches to character animation, this technique gives the characters a physical body, and a simulated brain to control it. This opens up a whole new range of possibilities for animators and gamers alike.

This animation technique works using a process of artificial evolution, so that a character learns how to move. Much different than the painstaking process of the past.