For Fallout: Brotherhood of Steel Richardson recorded the dialogue for the starting player character Cyrus, NPCs Blake and Soldier, and the NPC enemies Ghoul High Priest and Mutant Grunt. He also was a member of the cast of Fallout Tactics, but the character or characters he portrayed were not listed in the game's credits.
He is known for his deep voice; often portraying villains. Cyrus was a departure from this norm; Ghoul High Priest followed it. The whole of his Fallout: Brotherhood of Steel work was also a radical departure from any characters bearing resemblances to comedian Bill Cosby, whom he has played on Family Guy and The Boondocks,
