From The TimeSplitters Wiki

R-110 the latest (and possibly last) in thee R-100 Series of robots. At first R-110 is just like any other robot; He does whatever he is ordered to without question and speaks with robotic voice. After he recives the virus in TSFP he gains a massive personality change and is much more human. He enjoys destroying other robots and often taunts his enemies before taking them down. Despite being somewhat dim-witted, R-110 remains loyal to Cortez, and is even willing to risk his life for him.