Finding free game sounds is really hard but for a limited time, Sonniss is providing free sound libraries. The bundle includes 10GB sound effects you can use in your projects. It’s available until April 2nd!
If you want more, they have private subscription. Every month, they will share 1GB sound files with their subscribers.
Also you have a chance to win 200GB sound libraries worth over 8000$. If you win this, you can say goodbye to searching for sounds.
Edit: Here is the luck guys : The Winners