Console: Super Nintendo
Square was pumping out classic RPGs at such a ridiculous rate in the ‘90s that even Nintendo jumped at the chance to work with the company. The two companies expedited the process, with development only lasting a little over a year, but somehow in that time, Square came up with one of the funniest and best-looking games on the SNES. Super Mario RPG stands out as one of the finest RPGs and Mario games of all time.
Despite its pedigree and strong reception, Square and Nintendo have never worked together on another Mario RPG. The Paper Mario and Mario & Luigi series games that eventually sprung out of the collaboration have all been developed by Nintendo and its close affiliates without any involvement from Square.