Hello guys. I know many sites  that game developers can use to score free game sound effects and music for their games. The secret is knowing where to look. So, I've made the process even easier by compiling a list of websites that offer free game sound effects that you can use in your next project. Many of these sites vary from major sound databases like Freesound.org to small blog sites dedicated to a particular niche.
https://freesound.org/browse/tags/sound-effects/
https://www.lucidsamples.com/free-sample-packs/181-free-sound-effects-sfx-pack.html
http://soundimage.org/
https://opengameart.org/art-search?keys=sounds
http://www.themotionmonkey.co.uk/free-resources/retro-arcade-sounds/
http://soundbible.com/royalty-free-sounds-1.html
http://www.noiseforfun.com/
https://www.partnersinrhyme.com/pir/PIRsfx.shtml
http://www.freesfx.co.uk/soundeffects/

This is great! I've noticed a trend where entirely too many people rely on Sfxr or Bfxr for their sound effects, making the sounds always sound the same. It makes a game lose its uniqueness characteristic a little.* So it's very nice to have some libraries of sound effects readily available like this.

Additionally to your links, the Spherical Downloads Drive also has a bunch of sounds and music readily available for any game projects. Those are developed by the community members over here, and are available over here.

*To be fair, I also used Bfxr in Sir Boingers but that's before everyone started doing it. I'd replace them if I still worked on that game though.