Gust should be very high on the list.

Nippon Ichi is also up there.

Insomniac is also on the list.

I'm surprised nobody mentioned Tecmo Koei.

Gust.
Nippon Ichi.
Atlus.

Capcom? the same company that made Resident Evil 0 and Resident Evil remake exclusive to the gamecube last gen is Sony's most biased 3rd party? what has Capcom done for Sony lately?

capcom and sega are wierd... they do give a lot of love to the Wii... but they put all their higher budget titles on the HD...

For sony only i'd agree with Konami is the most biased.

then yeah... the companies releasing only PS3 games, but that's not being biased that's being exclusive.

oh yeah forgot about monster hunter tri... I guess that makes it a little even for SF4 and RE5.

thats not "weird" its just business.

I would have to say Rockstar. Out of all developers they are the only one that always kiss Sony's ass even if they're making games for other platforms.

I know why some would say Konami which in my opinion is not the case. It's only Kojima bias towards PS3 cuz he likes to have the latest technology. If the Xbox had had the latest technology it would be otherwise.

Also I think its clear that Square-Enix will jump ships at the sign of money like there's no tomorrow

Konami

Capcom goes where the money is at. SONY got the exclusives when they were clearly market leader. Now it's multiplats for capcom.

If you're talking publishers I'd rule out:

Square Enix[look at where there games are going this gen]

Namco [SONY only get's exclusive from them because SONY has stake in that company]

Capcom [Above reasons]

Activision [Uhhh...]

Ubisoft [I just don't see it]

Konami [Really, they only make reasonable decisions with where they put their games. MGS4 was just the company letting Kojima call a few shots and Kojima wanting to keep his fans happy]

Lucas Arts [I just don't see it]

Atari [They lay things out pretty even]

Take-Two [Just haven't seen much from them. Their's Agent, but really just one game...]

Microsoft [Listed for the lulz]

Bethesda [Late DLC, weaker ports]

Warner Bros. [They like Blu-Ray , no special attention to the PS3 though ]

MTV Games [Lol]

THQ [HD or Wii dev]

Midway [Multiplat Dev]

Disney [Seem to favor the Wii]

This leaves:

Atlus [Seems to like the PSP alot. Also they don't mind pleasing a few PS3 fans]
NiS [their games go to either PS3 or PSP, rarely DS]
Level-5 [Their games to to PS3 or handhelds]
SEGA [One of few companies willing to dish out some PS3 Exclusives]
Tecmo Koei [Sigma/2, Quantum... Just the fact that they show so much interest in the System]
Gust [Altus like reasons]