I buy the game before it be launched on Steam. How I can get my Steam copy of Slender The Arrival? Where I put the key? P.S sorry for my bad English, I'm Italian. Play out your worst nightmares from the relative safety of your own home with Slender: The Arrival. Developed by Blue Isle Studios and Parsec Productions, and published by Blue Isle Studios and Midnight City, this horror survival game brings the terrifying creation of Eric Knudsen, also known as Victor Surge, the Slender Man, to life.