Here are 69 Game Over Jingles to use, for free, in your projects.
You can listen and download them here
https://muweecollective.bandcamp.com/album/game-over-jingles-pack
All tracks have been made while the Music Weeklies Challenge http://www.musicweeklieschallenge.com when a Game Over Jingle had to be made daily for a whole week in a row.
All files are in WAV format.
You are free to use and adapt the songs in your projects, free or commercial.
Copyright/Attribution Notice:
You must give appropriate attribution to the composer, mentionning his name in the credits.
You'll find the name of the composer in the WAV file you will find in the Pack
<Name of the composer> - Game Over Jingles Pack - <Name of the track>