https://www.gamespot.com/articles/outlast-1-and-2-are-coming-to-switch/1100-6455535/

Outlast and Outlast 2 Switch ports are incoming. Right now, we know for sure that both ports will hit the hybrid system in Q1 2018.

Developer Red Barrels announced the ports via Facebook, thanking fans for sticking around for the last five years, detailing a little more about the future of Outlast, and what fans can expect next year. We don't have a specific release date/price point yet, and no details have been released whether if either port will have any exclusive or additional content.