http://www.youtube.com/watch?v=ROi_PoWQThc
The potential for multiplayer is there.
Also
[quote name='Runic Games Torchlight Q&A re: multiplayer'] 1) Will there be multiplayer in Torchlight (the single player ARPG that is currently released)?
No. The developers do not plan to add a multiplayer to the currently released version of Torchlight. There is a very rare possibility a 3rd party multiplayer mod could arise, but it is unlikely, and isn't official.
2) Then what is this Torchlight Multiplayer I keep hearing about?
The Torchlight MMO is a
separate game from the Torchlight ARPG that has already been released. It will be a free-to-play + online shop MMO game set in the Torchlight world. This will be an MMO, and thus multiplayer. This is
not a multiplayer mod to the Torchlight ARPG and you will not be able to carry over your current Torchlight character into the MMO version.
3) What is a free-to play MMO? Don't MMOs have a monthly fee?
A free-to-play MMO is free to download and play. The way the game makes money is by selling things (some select things, not everything) for real money in game. These may be potions that increase your exp gain for a duration, items, mounts, etc. (These are just examples and to my knowledge there has been
no confirmation from Runic about what exactly will be sold in the Torchlight shop. Shopping at the store is optional, and you can play the game without doing it. There will be no monthly recurring fee to play the game.
4) Why doesn't Torchlight, the ARPG that is currently out, have multiplayer?
Torchlight was made in under a year with the goal of providing a highly moddable single player ARPG experience. Runic decided that, rather than add multiplayer to this version of the game, they would focus on delivering the best single player game they could in their time frame, and then move on to development of their MMO.
5) When will the MMO be released?
Runic has said that their current time frame is 18-24 months from the release of the Torchlight ARPG. I imagine like most release dates, this is subject to change. But again, I remind everyone that I am not affiliated with Runic, so all I have to go by is that general time frame they've given.[/QUOTE]