1. Steampunk Iron Man Iron Man costumes are a dime a dozen, but steampunk ones aren't. Winning an award for best Marvel Costume at the 2010 New York Comic Con isn't too shabby either. [SOURCE]

2. Daft Punk Helmet It's impossible to avoid Daft Punk's mesmerizing techno beats. What better way to groove to the beats than with a DIY LED helmet. [SOURCE]

3. Halo Spartan Halo 4's a whiles off, but that doesn't mean everybody's favorite space marine can't represent. Nothing says hardcore gamer than a fan dressed up in Spartan combat gear. [SOURCE]

4. Glow in the dark Tron Suit Tron: Legacy was easily one of last year's geekiest movies, but it came out in December. For fans who didn't go Tron blue, this sweet costume is more than enough inspiration to get the creative juices flowing. [SOURCE]

5. War Machine Between Iron Man and Batman, both superheroes have enough weapons to nuke a small island. But War Machine, well, he has more ammunition than either of those guys combined and he keeps it slick with a classy metal costume. No fruity colors here. [SOURCE]

6. Fallout: New Vegas Veteran Ranger Tough, stealthy and armed with some badass costumes, Veteran Rangers were created after the founding of the New California Republic. Needless to say, crossing one is probably not a good idea, unless you like to be dead. [SOURCE]

7. iMac Cylon Anybody can build a Cylon costume. But it takes a person who truly "thinks different" to gut an old iLamp iMac's base, remove the CD-ROM drive and turn it into an Cylon helmet. [SOURCE]

8. Whiplash What fun would Halloween be if the streets are filled with people dressed up as Iron Man, but no enemies for them to battle? The whips might light up, but the whiplashing one may suffer from this will likely still hurt. [SOURCE]

9. Bioshock 2's Subject Delta Did you think the first Bioshock's Big Daddy was scary? Well, Subject Delta is even freakier — it's a Big Daddy spliced with a Little Girl — meaning he's every bit as menacing as the first character was. [SOURCE]

10. Bioshock 2's Big Sister Two Bioshock 2 costumes? Yes way! Why should Subject Delta have all the fun? This here costume glows a bloody red, but don't expect it to be waterproof. The Rapture's not real buddy! [SOURCE]

11. Gears of Wars' Anya Stroud When most people think of Gears of War, they think cover boy Marcus Fenix. Girls can have kickass armored costumes too as this babe proves. That Lancer is looking pretty chainsawin' good too. [SOURCE]

12. StarCraft Ghost What do you get when you mix a few football pads, a modded Nerf gun, some lights and a sexy babe? This. I dare you to make a hotter looking costume from the StarCraft universe. [SOURCE]

14. The Sims You see lazy, we see cool. The only thing missing from this costume is a mouse pointer attached to it. Maybe a wingman is needed on Halloween night! [SOURCE]

2. Daft Punk Helmet Another angle.

4. Glow in the dark Tron Suit Another angle.

4. Glow in the dark Tron Suit Another angle.

5. War Machine Another angle.

6. Fallout: New Vegas Veteran Ranger Another angle.

13. Metal Gear Solid 4's Raiden Nobody really likes Raiden. Snake's the poster boy of the MGS games, but it's undeniable that his redesigned outfit in MGS4 is pure awesomeness. Sure, he looks a little girlier at times, but that helmet is just nuts. [SOURCE]

15. Portal's GLaDOS Dressing up as a computer system would be pretty nerdy. That said, a little creative modding needed to be done. Without cutting off any limbs to replace with robotic wires, this chick managed to humanize GLaDOS. Not too bad, we think. [SOURCE]