Just to let you know, I've just posted a pack of over 200 original game sound effects inspired by the classic arcade games of the late 80's/early 90's. They cover a good range of styles/genres and are included in 24-bit uncompressed wav, ogg and m4v formats. They're prefect for any retro style games and free to use (even in commercial projects).
It's also worth mentioning, I intend to do regular updates/additions. So if you need any specific additions for a project, feel free to let me know and I'll try my best to get them included in a future update.