The Ghost of RubangB on 21 April 2010
I'd put Sega, Capcom, Rare, Konami, and probably several others between Nintendo and Sony in this category.
Especially if you go by leo-j's definition, because than I'd have to count Half-Life 2 and Portal as platformers and Valve would blow all of them away. (Portal is 10 times the platformer Uncharted is, but it's still not a platformer.)
They added a jumping unit to StarCraft 2, so I guess that's a platformer now too.
