https://www.polygon.com/2018/3/9/17100548/gamemaker-studio-2-nintendo-switch-undertale

Yesterday’s news of Undertale coming to Nintendo Switch was notable for more than just the fan-favorite game being ported to the platform. It also kicks off a deal between Nintendo and the makers of GameMaker Studio 2, the engine behind Undertale.

YoYo Games, the engine’s designer, said it had reached a partnership with Nintendo that, beginning this summer, will allow developers to export their work directly to the Switch architecture.