Originally posted by dragonseyes:
I think the most annoying voice I have heard is the girl on Beyond Atlantis 2, which is really part 3. I think they used on Broken Sword 3 too,
Not the same actress at all. The voice actress in Beyond Atlantis 2 is actually a fairly well known actress, at least in Europe, Chiara Mastroianni. Nico in BS3 was voiced by Sarah Crook.
The worst I've heard was in Watchmaker and in Jazz and Faust. Other games may have corny cartoony accents or weird foreign accents or annoying voices, but for just plain flat out bad voice acting, nothing beats Watchmaker and Jazz and Faust (especially the ship captain Faust).