BioWare will tell the story between Mass Effect 2 and Mass Effect 3 with downloadable content packs, can reveal.

BioWare has released only one story-based downloadable pack since the January release of Mass Effect 2. The Kasumi - Stolen Memory DLC introduced a new party member and an associated loyalty mission.

The Overlord DLC, due in June, will see Commander Shepard investigate a Cerberus research base home to a hybrid AI.

BioWare intends to release a "continued stream" of DLC, lead producer Casey Hudson told as part of a Mass Effect 2 retrospective.

"We have a bunch of packs that are in the works right now," Hudson said.

"So, for the time being there's going to be a continued stream of DLC for people. We'll start to have packs that'll tell the story between Mass Effect 2 and 3. But beyond that we kind of have to see how people are responding to what we have and go from there."

Mass Effect 2 was released in January to critical acclaim. We gave it ten out of ten in our review.

Although BioWare has confirmed that work has begun on the third game in the RPG shooter series, the Canadian developer isn't ready to reveal details on it just yet.

"It probably won't be for quite a few months that we talk about Mass Effect 3," Hudson told us.

That makes an E3 reveal next month highly unlikely.

Earlier this year EA chief operating officer John Schappert said the publisher will release "something far reaching from Mass Effect" in the January through March 2011 quarter.