Gossett is the voice of the Vortigaunts in the video game Half - Life 2 .
Is the Free Jaffa Leader Gerak in Season 9 of the sci - fi television series Stargate SG - 1 .
Gossett is the voice of the Vortigaunts in the video game Half - Life 2 and is the Free Jaffa Leader Gerak in Season 9 of the sci - fi television series Stargate SG - 1 .