Ellen McLain name name image_size landscape alt caption background name language name alias birth date birth place origin death date death place genre occupation instrument years active label associated acts website name module module2 module3 Ellen McLain is an opera singer and voice actress from Nashville, Tennessee, USA. McLain provides voices for many characters in several video games from Valve. Among them are GLaDOS, the artificial intelligence antagonist in Portal (for which she won an AIAS Interactive Achievement Award for Outstanding Achievement in Character Performance) and Portal 2, the announcer in Team Fortress 2, and the voice of the Combine overwatch for the Half-Life 2 series.