Square Enix have announced that gamers who pre-order the upcoming Dungeon Siege 3 on Steam will receive the first two games (unsurprisingly, called Dungeon Siege and Dungeon Siege 2) for free as part of the deal - and you get them to play now:

"Providing DUNGEON SIEGE I and DUNGEON SIEGE II free of charge through Steamworks is Square Enix’s way of showing appreciation to the fans of the DUNGEON SIEGE franchise," said David Hoffman, executive producer for DUNGEON SIEGE III. "Selecting Steamworks to be integrated into the upcoming DUNGEON SIEGE III title made perfect sense as we wanted to provide the best possible gameplay experience for PC gamers and long-standing fans of the series.”

It's great to see more and more offers like this with publishers capitalising on their old IP not by trying to sell you ancient games at inflated prices, but by making it a value-add for their newer titles. That said, I prefer the model where they make their old games available for free to try to entice you in to the story :)