GameTap has added this week's selection of new games, including a couple of freebies. Their new premium games are Gas Powered Games' Supreme Commander: Forged Alliance and Treyarch's Die By the Sword: Limb from Limb. For you cheapskates, there are two new free games, as Codemasters' fantasy action/adventure Overlord will be free for the coming week, and Penumbra Overture is also now free, offering the chance to play the middle installment in Frictional Games' horror/adventure trilogy.