For the second year in a row, Microsoft is inviting Xbox Live users to vote for their favorite downloadable games on Xbox Live Arcade.

Six games were nominated in each of nine categories, including Best Overall Arcade Game, Best Cooperative Multiplayer Game, and Best Innovation in XBLA, to name just a few.

Number-None's Braid is a leading contender, nominated in five different categories, and publisher Capcom enjoys a strong presence as well with Street Fighter II HD Remix, along with Bionic Commando Rearmed and Mega Man 9.

The full list of nominees by category is as follows:

Best Overall Arcade Game
Braid
Castle Crashers
Geometry Wars Retro Evolved 2
Street Fighter II HD Remix
Portal: Still Alive

Best Original Game
Castle Crashers
N+
Braid
Penny Arcade Episode 1
Schizoid
Age of Booty

Best Family Game
Boogie Bunnies
Roogoo
A Kingdom for Keflings
Lost Cities
Meteos Wars

Best Co-operative Multiplayer Game

Castle Crashers
Schizoid
Bionic Commando Rearmed
N+
Geometry Wars Retro Evolved 2

Best Competitive Multiplayer Game
Street Fighter II HD Remix
Geometry Wars Retro Evolved 2
SoulCalibur
Meteos Wars
Age of Booty

Best Solo Game
Braid
Mega Man 9
Penny Arcade Episode 1
Rez HD
Portal: Still Alive

Best Innovation in XBLA
Braid (time travel)
A Kingdom for Keflings (use of Avatars)
Fable II Pub Games (retail game integration)
N+ (level sharing)
Duke Nukem 3D (dynamic replay)

Best Graphics
Street Fighter II HD Remix
Geometry Wars Retro Evolved 2
Braid
Castle Crashers
Bionic Commando Rearmed

Best Classic/Remake Game

Bionic Commando Rearmed
Street Fighter II HD Remix
Mega Man 9
Galaga Legions
Rez HD

Xbox Live users can vote for the nominees on the service's Spotlight Channel between March 3 and 10; winners will be announced shortly thereafter.