It's quite simple which games need to sell more...and that's all of my favorite ones.

Franchises/ games that should sell more:
God of War, Alan Wake, Castlevania: Lords of Shadow, Bioshock, Mass Effect, Oddworld, Resistance 3, LittleBigPlanet 2, Forza 4 and Deus Ex: HR.

Halo needs to be as big as COD

Fire Emblem is the correct answer.

Another game that came into my mind is deus Ex 3. Its really a great game. ive spoend about 20 hours right now and no end in sight. Deserve much more.

infamous is a great series and its a sandbox super hero game defiantly deserves more sales

Monster Hunter - everyone keep saying this is a big series but when you look at the sales outside of japan particularly in the west the sales are not so great

Bioshock - especially since this gen is so shoot caze this series stands different of the rest with a great gameplay unique story and interesting settings

Yakuza - its a japanese gta come on

infamous is the only one I can think of.

Fire Emblem: games are awsome and have so much quality and a great addicting gameplay

Xenoblade: Need I say more

Castlevania:really great games 

Metroid:need I say more

Okami:...

Eathbound(Mother) : some of the best jrpg's and we didn't got the rest due to bad sales

Fire Emblem- It's a fantastic game that's never really driven sales, it deserves way better.

Pikmin 3- The first two were amazing and Wii U can only make this one better, it deserves to sell millions so that more Pikmin can come.

Chibi-Robo!- The first one was a fantastic game which was released at an awful time and never sold as much as it deserved to, if a new one comes, it deserves to sell much more, as do a lot of Skip ltd.'s games, they're all really creative, wierd, but creative.

Okami- Glad that it got a sequel, but the series as a whole deserves much better sales so that a third can come.

Totaly

Vanquish beeing my Zone Of The Enders of this generation...I would love to see a sequel

If Platinum Games would be bought by Sony, we would definately see a sequel!!! buy em Sony!! (and the franchise) well they will be doing great with Kojima