Michael Hollick, the actor who did the Niko Bellic voice-over is apparently not happy with his $100,000 payment.

He complains that he doesn't get much residuals for the huge success of the game nor any royalties for having voice-over work because "ontracts between the actors’ union and the entertainment industry make little or no provision for electronic media like video games and the Internet. It is a discrepancy that is expected to dominate negotiations between Hollywood and the guild this summer, with many predicting an actors’ strike to parallel the writers’ strike last year, which revolved around similar issues."

Sorry to hear that, Michael Hollick. How long was that voice-over work? Two? Maybe three weeks of work? And you get a hundred grand for it? Man, I can feel your pain. /sarcasm

Forget that, though. I think it's your (or your agent's) fault that you didn't negotiate for those royalties prior to signing the dotted line. Oh, you probably realized that if you realized at the time that you can easily be replaced by another voice-over actor had you not agreed to
the payment? or that they could have gone with a star actor if you asked for more?

So yeah given your situation, a hundred grand is a nice payment. So STFU.