From The TimeSplitters Wiki

Unlock

I had to complete hard mode to get this character.

Maybe in the american version its diffrent?

As far I know, there's no difference between any of the games information in different countries. And there is only one character you recieve on Hard and that is on the final level where you unlock a Crow. --ILHI 11:53, 29 December 2007 (EST)

Strange.

I played mansion of madness on easy earlier and I did not unlock him.

We are wrong from time to time, and Game FAQs says Normal. So try Normal. --ILHI 12:26, 29 December 2007 (EST)