For starters, total videogame sales in December were down 21% compared to 2010.

A few weeks ago, we reported that Batman: Arkham City would be getting a Batman Inc. costume download. Today, Rocksteady have confirmed this news.

North America saw lots of sequels released in November and they all sold better than their predecessors.

There’s one more skin Warner Bros. hasn’t revealed. A source tells Siliconera, Batman: Arkham City will also have a Batsuit from Batman Incorporated.

Instead, he prefers his staff.

A day out for Rocksteady involved a trip to Wayne Manor.

Batman: Arkham City sold over 1.5 million copies on consoles last month.

A new trailer shows how Nightwing fights in the game once you download his character pack.

“We’ve added a lot of things, like simultaneous counters so that Batman can fend off two, three enemies at once,” Rocksteady say about Arkham City’s combat.

Arkham City’s launch trailer returns to Dr. Hugo Strange’s obsession with Batman.

Nightwing will come bundled with two special challenge maps: Wayne Manor and Main Hall.

No new villains in this trailer — it’s all Joker and Harley.

Warner Bros. have announced finalized release dates for Batman: Arkham City for the U.S., Europe and Australia.

“Robin is a complex character and very different to Batman — it’s not a case that we’ve just reskinned him,” Rocksteady marketing game manager, Dax Ginn.

Guess what he’s trying to do (again).

The ESRB rated Batman: Arkham City and gave it a Teen rating. Save for bits of colourful dialogue, there rating summary is what you would expect.