Own The Sims 3 on Steam? Get 60% off The Sims 3 Supernatural!
Steam currently has a sale for spooky games, including The Sims 3 Supernatural! There is one snag though, you need to own The Sims 3 on Steam before it allows you to buy Supernatural!
It costs 15 Euros in Europe, 12 pounds in the UK and 8$ (without taxes) in the US.
You can buy the EP here: http://store.steampowered.com/app/223593/