This topic is for all systems, from any generation. As long as you have bought or received the game in 2009, then you can include it.
I wonder how many people can actually make a list, if you've been updating your collection on your userpage, then that makes it easier.
As for me, 2009 has been my biggest year. I don't expect 2010 to be close to it, number wise anyway. Quality should be better though. lol :D
January: Kirby: Canvas Curse
February: N/A
March: MadWorld, Grand Theft Auto: Chinatown Wars, Pokémon Platinum
April: World of Goo, NPC Pikmin, Excite Bots: Trick Racing
May: Super Princess Peach, DSi, Dr. Mario Express, Art Style Pictobits, Art Style Orbient, Toki Tori, Elebits, F-Zero X
June: The Conduit, Art Style: Aquia, Art Style: Rotohex, Tetris Party, Mario vs. Donkey Kong: Minis March Again
July: Klonoa, Wii Sports Resort, Art Style: Cubello, Bit. Trip Beat, Sin & Punishment
August: Metroid Prime Trilogy, Art Style: Boxlife, ArtStyle: Base 10, Art Style: Zengage, Super Metroid, Bit. Trip Core, Flipnote Studio
September: Mario & Luigi: Bowser's Inside Story, Scribblenauts, Art Style: precipice
October: Boom Blox, F-Zero, Kirby's Dreamland 3, LostWinds: Winter of the Melodias
November: New Super Mario Bros. Wii, Kirby64: The Crystal Shards, Super Mario Kart, Bit. Trip Void, Pokémon Rumble,
December: The Legend of Zelda: Spirit Tracks, The Legend of Zelda: Majora's Mask, Super Smash Bros., Super Mario Bros 2: The Lost Levels, Metroid, Bully: Scholarship Edition, Art Style: Digidrive
J: 1 F: 0 M: 3 A: 3 M: 8 J: 5 J: 5 A: 7 S: 3 O: 4 N: 5 D: 7 Total: 51
Wii: 11 WiiWare: 11 Virtual Console: 11 DS: 7 DSiWare: 10
1st/2nd party: 36 3rd party: 14
How about you guys?