What are your top 5 game developers?

I'm talking about the companies and the studios, not the people. So, for example, if Metal Gear Solid is your raison d'etre then tell me "Konami (Computer Entertainment Japan)"/"Kojima Productions" rather than "Hideo Kojima". Got it? Go!

*Let me just add that I'd really like you to treat this as a top 5 of all time, not just currently. So if there's an old developer or a developer which had a great era that perhaps has past, then feel free to put that too!

Examples of the above:
Bullfrog Productions from the 90s
Rare during the 90s and early 00s before most of their original staff left (sorry to all you Nuts and Bolts lovers...)

1. Nintendo
2. Capcom (Though I hate a lot of decisions they do)
3. Konami (All about Castlevania, baby)
4. Retro Studios
5. Intelligent Systems

... I guess.

Let me just add that I'd really like you to treat this as a top 5 of all time, not just currently. So if there's an old developer or a developer which had a great era that perhaps has past, then feel free to put that too!

Examples of the above:
Bullfrog Productions from the 90s
Rare during the 90s and early 00s before most of their original staff left (sorry to all you Nuts and Bolts lovers...)

1. Intelligent Systems
2. EAD 1
3. Rare pre-Microsoft
4. Retro
5. HAL

--

Seriously though:

1. Nintendo
2. Valve
3. HVS
4. LucasArts
5. Sega

It has been done before... but everything has

1. Naughty Dog
2. Rockstar North
3. Infinity Ward
4. Insomniac
5. BioWare

Ah, that's a /lot/ tougher, then. I'll have to get back to you on that.

1. nintendo
2. Square Enix
3. Capcom
4.sega
5. Activision Blizzard

1.Rare
2.Bungie
3.Crystal Dynamics
4.Naughty Dogs(They would have been number two, if not for their PS3 offerings)
5.Insomniac(The PS1 days mostly)

As you can see I like platformers

1. Square Enix
2. Atlus
3. Nintendo
4. Namco Bandai
5. tri-ace

1. Square Soft (not SE :P)
2. Sony
3. Konami
4. Atlus
5. SEGA

..i need more time to think XD