via Computer and Video Games

Rockstar co-founder Dan Houser says he's "not sure" if Grand Theft Auto IV's highly lauded downloadable content will be out this year.

Speaking to Variety's Cut-Scene blog during GTA IV's Japanese press rounds, Houser says that Rockstar hopes to announce something "in the next few weeks".

"It's going well," the creative VP told the site. "But we don't know a date. We hope to be announcing that in the next few weeks.

"We're still figuring out a few things. We're more focused on quality than dates, always have been. But the development is going really good. It's shaping up to be something we're very proud of. That was our goal".

Houser didn't offer details on what, other than the date, Rockstar will be announcing in the coming weeks but he says he wants to give people a rough idea on what to expect, "so their expectations are roughly in line".

"We don't want them to imagine it's this enormous thing that it can never be," he said.

"Doing a big digital launch is something we've never done before. It's virgin territory, but at the same time, we feel very exposed because there's no case history. No one ever came out with major DLC for a major game like this before."