I've got a question about this: Is he a voice-actor in Mass Effect 2 or does he actually appear in live-action footage? I only know that game from hearsay, so I don't know whether it includes live-action footage. (Today's games usually seem to have cutscenes in the game engine instead of seperate live-action or pre-rendered scenes.)
If he is just doing voice-overs, is his character's appearance modelled after how the voice actor looks? You know, they sometimes do that, think of Tolwyn in Wing Commander Academy or Xanatos in Gargoyles.