Voice actors perform voice-overs to portray characters in the Fallout series. Every released Fallout game has featured voice acting, though it has appeared in many different forms. In Fallout and Fallout 2, only talking heads were voiced, though the transition to a 3D environment with Fallout 3 created the need for voice acting in every single character. Since then, all characters that appear in a Fallout game are voice acted, though often times there are overlap in actors who perform multiple roles.
- Voice acting on Wikipedia