@Cliqist they report that Stygian: Reign of the Old Ones is teasing a backer demo for the first half of 2017 with a public release to follow according to the latest kickstarter update.
More information.Stygian isn't expected to be complete until November of 2017. Luckily, according to the Kickstarter update, backers will be able to visit Arkham much earlier. An exclusive demo is planned for the first half of 2017. The demo will feature complete character creation and begin with the first chapter of the game. Backers will get first dibs on demo access with a public release to follow.