Titan Quest rocked indeed, a tragedy what happened to the developer studio behind it.
That is a long story, sir.
Iron Lore was the company behind TQ, and they went out of business shortly after the TQ expansion went live. Basically, they were a small studio, they say they did not make enough money off TQ in order to be completely self-sufficient, and they could not secure enough funding for their next project. In 2007, they shut down and Iron Lore ceased to exist.
However, a couple of the people behind Iron Lore reformed as Crate Entertainment, and they started developing their own game in-house using their own money. They spent the next year reacquiring the TQ IP and in 2010 / 2011 they announced they were making a game called Grim Dawn, which was going to be the official sequel to TQ. They have spent the last 2+ years working on it out of their garage, quite literally. They have existed off their own money and donations from the general public. (A "donation" essentially got you a preorder copy of the game, access to beta, and other stuff depending on how much you donated).
They just put up a
KickStarter a couple days back to finish the last round of funding.
I probably donated more than I should have, but I like backing the small guys ... especially the ones who put out something like TQ.