The expansion pack for the series is released on September 7 and Collins follows in the footsteps of Katy Perry and other stars in being turned into a Sims character.
"I love The Sims 3 for loads of reasons," Collins said.
"It's a virtual world so you can spend loads of time customising how your Sims look, giving them different personality traits and creating a unique world to play with their lives."
He added: "I especially like Supernatural because I love Halloween and dressing up, so being able to play with characters like vampires, zombies and werewolves just makes the game even better."
Watch a behind-the-scenes video of Collins becoming a Sim below:
Watch The Sims 3: Supernatural announcement below:
The Sims 3: Supernatural - photo gallery