On VGChartz.com | you can see weekly sales charts for games, going back for years. I used this list to compile a list of rpg's that sold atleast 100,000 copies in their first week. I made one for 200,000 and one for 300,000 also. Please note that no rpg through all of 2005 sold atleast 100,000 copies in their first week, I checked!

Code:
Rpg's selling atleast 100,000 copies in their first week(17)...
...Nothing in 2005...
3-21-06		XB360	259,524		The Elder Scrolls IV: Oblivion
3-28-06		PS 2	719,701		Kingdom Hearts II
8-15-06		PS 2	176,104		Final Fantasy VII: Dirge of Cerberus
9-19-06		DS	197,628		Pokemon Mystery Dungeon: Blue Rescue Team
9-19-06		GBA	155,685		Pokemon Mystery Dungeon: Red Rescue Team
10-31-06	PS 2	571,945		Final Fantasy XII
11-14-06	DS	121,026		Final Fantasy III
11-19-06	Wii	441,285		The Legend of Zelda: Twilight Princess
12-12-06	Wii	292,353		The Legend of Zelda: Twilight Princess
4-9-07		Wii	164,918		Super Paper Mario
4-26-07 	DS	1,404,722	Pokemon Diamond/Pearl
6-26-07		Wii	145,115		Pokemon Battle Revolution
8-21-07		Xb360	116,775		Two Worlds
10-1-07		DS	233,810		The Legend of Zelda: Phantom Hourglass
11-20-07	Xb360	266,330		Mass Effect
2-12-08		Xb360	101,277		Lost Odyssey
3-25-08		PSP	222,122		Final Fantasy VII: Crisis Core

Rpg's selling atleast 200,000 copies in their first week(10)...
...Nothing in 2005...
3-21-06		XB360	259,524		The Elder Scrolls IV: Oblivion
3-28-06		PS 2	719,701		Kingdom Hearts II
10-31-06	PS 2	571,945		Final Fantasy XII
11-19-06	Wii	441,285		The Legend of Zelda: Twilight Princess
12-12-06	Wii	292,353		The Legend of Zelda: Twilight Princess
4-26-07 	DS	1,404,722	Pokemon Diamond/Pearl
6-26-07		Wii	145,115		Pokemon Battle Revolution
10-1-07		DS	233,810		The Legend of Zelda: Phantom Hourglass
11-20-07	Xb360	266,330		Mass Effect
3-25-08		PSP	222,122		Final Fantasy VII: Crisis Core

Rpg's selling atleast 300,000 copies in their first week(4)...
...Nothing in 2005...
3-28-06		PS 2	719,701		Kingdom Hearts II
10-31-06	PS 2	571,945		Final Fantasy XII
11-19-06	Wii	441,285		The Legend of Zelda: Twilight Princess
4-26-07 	DS	1,404,722	Pokemon Diamond/Pearl
Look at that last list. It seems that all young kids are getting Pokemon and Kingdom Hearts games. If you look for the more hardcore rpg players it seems that Final Fantasy XII and The Legend of Zelda: Twilight Princess(Wii version) dominated rpg sales for the last 3.5 years!

In 2008, Final Fantasy VII: Crisis Core is dominating all rpg's in sales, including Lost Odyssey. I don't think that Persona 3: Fes will sell super high though. Watch out for the first week sales for: Pokemon Mysterious Dungeon 2, Mass Effect(PC version), and Age of Conan: Hyborian Adventures(PC Mmorpg).

For Fall 2008, watch out for high sales for Fallout 3, Fable 2, and White Knight Story. I think Fallout 3 will sell the highest and beat all rpg's in sales this year, and possibly in overall quality. What are your thoughts on this information?