Rocksteady has a couple early Christmas gifts in store for all of us. As a way of thanking us for supporting (spending money) on Batman: Arkham City, Rocksteady is going to give away the Batman Inc. downloadable skin on Xbox Live, PSN and the Games for Windows Marketplace. You’ll be able to grab it on December 21, 2011. As we all know, free Arkham City skins are hard to come by if you didn’t pre-order the game. For many of us, this will be the first time we get to play as one of the other Batmans (Batmen?).

Batman: Arkham City is available today. You can no longer get all those unlockable costumes that came only came with pre-orders. Arkham City was pretty notorious for offering retailer-specific costumes, but there will certainly be a way to purchase all of them in due time. In fact, you can get the Batman Beyond skin today if you purchase a NOS energy drink. Who knows, it may come in handy by keeping you energized while you complete all those Riddler challenges.

I know, this week Important Importables was going to talk about EasyGameStation, a doujin game maker that’s found fame overseas thanks to Carpe Fulgar deciding to localize two of its games, but Halloween is coming up. Which means people are probably just working out their plans, deciding if they want to go out to a party, or stay in and tend to the trick or treaters.

In either case, costumes are in order and video games can serve as great inspiration for finding one that is iconic, recognizable to other gamers and often very easy to pull together. Since times are tough, here are 10 possible costume ideas that could end up working out really well for you. Most are pretty easy to pull together. You may even already own some of the necessary components. In cases where you don’t, it’d probably cost less than $20 to get everything you’d need together, give or take depending on any liberties you decide to take with the concept….

Know what would be a great costume for female gamers this year? Chell. Really, it’s simple, it’s awesome and, if you’re slightly shy about your nerdy side, you could always claim you’re just dressed up as an escaped prisoner. All you need is a white tank top, an orange prison inmate one-piece with the top tied around your waist and. Well, actually, there’s something missing. Not the Portal gun or companion cube, but the Long Fall Boots. I guess it’s time to go to J!NX.

J!NX is an online retailer known for its rather awesome geeky clothes, with a focus on appealing to gamers. One of its latest products is a pair of Portal 2 Long Fall Socks…

Okay, this has done it. This whole Angry Birds fad has gone too far. Now I’m going to be worrying if I’ll have a flock of birds tossing eggs on my car if my Halloween candy doesn’t meet with Trick or Treaters’ approval.

But I’m getting ahead of myself.

There are Angry Birds Halloween costumes…

So you’re planning to get Dissidia 012 [duodecim] Final Fantasy next month on March 22, 2011 for your PSP. Good for you, I’m sure you’ll enjoy it. You may have a bit more fun with it if you decide to pre-order though. See, Square Enix has some pre-order promotions planned with Amazon and GameStop. The bonuses don’t change gameplay, but they do make it look a little cooler…

Similar to the post about the contents of Call of Duty: Black Ops‘ zombie mode being spoiled, this post also contains a decent sized spoiler. Ezio had a number of unlockable outfits in Assassin’s Creed 2 and it appears he’ll have access to at least five more in Assassin’s Creed: Brotherhood. One of these outfits is sure to get gamers excited. Prepare for it to be spoiled. You’ve been warned.

Guybrush Threepwood, the might pirate from the Monkey Island games is in Star Wars: The Force Unleashed II. He just doesn’t make a cameo appearance either. Guybrush is fully playable. The Force Unleashed II won’t be released until October 26, but someone has already figured out how to unlock Guybrush.

How goes your timed zombie killing experience in Dead Rising 2 so far? There are already a lot of different outfits to wear in the game and chances are you probably haven’t tried on all of them. Put those aside for now and pick up the Dead Rising 2 Psychopath theme pack. This DLC is available on Xbox Live, Games for Windows Live and the PlayStation Network today for 160 Microsoft Points or $1.99 on PSN.

We hope you’re getting some mileage out of our unlockable costume guide for Shank. There’s still a few more costumes to be revealed before the list will be complete. Klei revealed what is perhaps the most baffling alternative Shank costume earlier today (August 25, 2010). Everyone’s favorite dispenser of justice, otherwise known as DeathSpank, is playable in Shank. To be more precise, DeathSpank’s costume can be worn by Shank.