Personally I'm excited to play Rhythm Thief for the 3DS, it looks ridiculously fun!

Action – [PS3 / X360 / PC / MAC]

• 7554 (PC)
• Barbarian - The Death Sword (PC, MAC)
• Binary Domain (PS3, X360)
• Black Knight Sword (PS3, X360)
• Deep Black: Reloaded (PC)
• Mortal Kombat Komplete Edition (PS3, X360)
• Nexuiz (X360)
• SOLAR ANNIHILATION (X360)

 
Adventure – [Wii / PC]

• Da New Guys: Day of the Jackass (PC)
• PokePark 2: Wonders Beyond (Wii)

 
Puzzle – [PS3 / X360 / 3DS / DS]

• Country Dance All Stars (X360)
• Order Up!! (PS3)
• Rhythm Thief & the Emperor's Treasure (3DS)
• Zuma's Revenge (DS)

 
Role-playing – [PS3 / DS / PC / MAC]

• Hyperdimension Neptunia mk2 (PS3)
• The Lord of the Rings Online: Mithril Edition (PC)
• Shin Megami Tensei: Devil Survivor 2 (DS)           
• WAKFU (PC, MAC)

 
Strategy – [MAC]

• Company of Heroes Complete: Campaign Edition (MAC)

               
Sports – [PS3 / X360]

• SSX (PS3, X360)