Most Badass Weapon in a game

[Scorched_Cascade]

Borderlands has several.
Rocket firing shotgun:

The Torque Bastard:

Eridian Thunderstorm

I want to hug whoever made the random weapon generator for that game.

 

[WiwuX]

Nevan from Devil May Cry 3 is awesome from pure camp factor. It's a scantly-clad demon lady; that turned into an electric guitar; that fires bats and lightning; and has a fold-out scythe attachment.

 

[Macgyvercas]

Obligatory BFG-9000 response.

Seriously, that weapon kicks ass, even if it does eat ammo like trail mix.

 

[Ninjat_126]

I'm a fan of the Automatic Shotgun from Metro 2033.

http://metro2033.wikia.com/wiki/Automatic-Shotgun

 

[Rayne870]

This http://wiki.runestorm.com/index.php?title=Dark_Star of course I can't find and image for it...but the description is pretty badass.

 

[LightspeedJack]

Now that is sweet.