GameTap has announced that two more games, Gondomania and Sam & Max Season Two: Episode 3 "Night of the Raving Dead", have been added to its network's massive library of current and classic console, arcade, PC and original titles. Also, the rotating selection of completely free-to-play games includes Sam & Max Season One: Episode 4 "Abe Lincoln Must Die!".
Update: an official Night of the Raving Dead walkthrough can be found here.