Hello.I am gave developer . I always use some good sound effects for my projects.I want to give u link on these sound effects packs.
first packs u can find at this site https://www.freesoundeffects.com/free-sounds/scary-and-horror-10085/
second pack - https://www.lucidsamples.com/free-sample-packs/80-free-music-production-dj-samples-loops.html
Enjoy! If u know good free high-quality sounds effects , pls share with me!