A trial version of the second Slender game, "Slender: The Arrival," is available on the Xbox Games Store. The original indie Slender game, "Slender: The Eight Pages," is free. It can be legally downloaded for Windows and Mac platforms. Safe download links are provided by the developer at parsecproductions.net.
"Slender: The Eight Pages" runs on Windows and Mac OSX and is available for free. The sequel, "Slender: The Arrival," has been released across several platforms including Microsoft Windows, Mac OSX, PlayStation 3, Xbox 360, PlayStation 4 and Xbox One. The availability of a demo or time-limited trial copies of "Slender: The Arrival" varies by platform and depends on whatever promotions are active at a given time.