Team Ico.

SEGA and Platinum: VAlkyria Chronicles, Bayonnetta( Platinum), Yakuza,

Atlus: SMT and persona nuff said

Guerrilla games: Killzone

Konami: Suikoden series

CyberConnect: Just hope they fix the issues of the online it's really hideous ugh! Sessions are BS if you know what I mean.

Nis Games

Tecmo Koei

Team ICO: They deserved much much more than just the praise.

Sucker Punch: Hope inFamous 2 sold great 2-3m range.

Insomniac

From Software

Gust Media Vision

Capcom: Breath of Fire

Platinium Games

Double Fine Productions

Grasshopper Manufacture

Climax

Eurocom

Rare: They get a lot of undeserved hate. While making 2 of my top 3 games this gen 

Lionhead: Another studio that sees a lot of hate for no good reason...

From Software: None of their games have disappointed me this gen 

Sandlot: They made Earth Defense for heavens sake! >.>

Mistwalker: Made arguably the best JRPG this gen.

Kalypso: Tropico 3 is my favorite economy sim this gen!

Sony Japan. They are responsible for making my favorite games of all time. 1. Patapon 2. SoTC 3. Loco Roco 4. Demon's Souls (That's right) 5. Echochrome

Fuck, how many of you are voting From Software for Demon's Souls? You guys might be suprised to find that Sony Japan duel developed the game. That's how you get such a quality diffrence between this and that

I wish their games would sell more dammit they deserve it!!!!!

NIS- and practically every game they make

 GRasshopper, inteligent systems, level5, way forward, triAce, matrix software, imagepooch, chunsoft...

Sucker Punch: The Sly Cooper series and Infamous are both awesome

Team Ico: SOTC 

Naughty Dog: Uncharted series. Im not saying it sold bad because it definitely sold well (3-4 mil range each) it just makes me sick to see that a call of duty game that IMO is the same game each and every year just with a different cover, happens to sell quadruple of what a masterpiece like Uncharted 2 has done.

VAlkyria Chronicles and Ryu Ga Gototu(yakuza) bis not Platinum Games  VAlkyria Chronicles is SEGA WOW and Ryu Ga Gotoku is Amusement Vision 

Atlus. one of the most unique and best publishers/developers around. without them, I don't think games like Demon's Souls would've been as popular. and speaking of Demon's Souls...

From Software. again, Demon's Souls! Nuff said!!! also their King's Field series and 3D dot game heroes look very interesting and might check them out.

Sucker Punch. Infamous is one hell of a game and I can't wait to get my hands on the new Sly collection. I honestly find them much superior to Sony's other First-party devs. except for Insomniac.

Frozenbyte. I'm not familiar with their other games and they are a relatively small team based in Finland but they created Trine, excellent platforming game and one of my personal favorite indie games.