5. Nintendo EAD -
Not sure which Nintendo studio is which, so I just copied what everybody else put. 
Anyway, every game they make is meticulously polished and a tonne of fun.
4. Naughty Dog -
Nicknamed Naughty Gods for a reason. They were technologically well ahead of every other developer last gen. Their games are very fun and very well written.
3. Square Enix -
They've consistently delivered some of the greatest JRPGs of all time. Yes, even now.
2. Kojima Productions -
Kojima's games are extremely unique, with an odd blend of East and West, realism and fantasy, seriousness and humour, all with a convoluted overarching storyline. Although each game has a very different theme and setting, they all have immersive stealth gameplay and incredible boss battles.
1. Atlus Persona Studio -
No other developer had impressed me as much as these guys, with their incredible writing, loveable characters, funky soundtracks and unique gameplay, every game they put out is a masterpiece.
