Hey! Navi Retlav Studio has teamed up with Reason Studios, to create a Halloween gift for musicians around the world. We have made 3 exclusive free packs of sounds and samples available for download on the Reason Studios Blog.
Halloween Monsters - https://www.reasonstudios.com/blog/free-halloween-sound-packs
Japanese Horror Castle - https://www.reasonstudios.com/blog/download-the-free-japanese-horror-castle-friktion-pack
Cinematic Gamescapes - https://www.reasonstudios.com/blog/cinematic-gamescapes-new-free-sound-pack
All these packs include Reason 11 Suite Patches (a big portion of them will also work in older versions of Reason DAW), loops/previews and a demo song. The Halloween Monsters pack is extra special since it also contains 120 wav-samples of smashing tomatoes, breaking corn, and fridge noises that I used for scary sound design. On the flip-side, the Japanese Horror Castle page also includes a really interesting article about our sound design work.
There are also a lot more goodies on the Reason Blog from other sound designers, so please feel free to look around there and see what catches your eye.
Here is an extra tip: Combine these samples with our free impulse responses using any convolution reverb plugin, and I guarantee you will be able to create some really scary ambiences.