Is there a way to play my favorite ogg files ?

What is "Ogg/Vorbis" compression?

Ogg/Vorbis (http://www.vorbis.com/) is the audio compression standard used by Vendetta. OV is similar to mp3, but superior in quality and has a more developer-friendly license. The "/playmusic", "/stopmusic", and "/playlist" console commands of the Vendetta Test can be used to play Ogg files in-game. The playlist command will play an m3u list of Ogg files.

sorry *hide*

how can i play these files?

Put the file anywhere you want on your computer and then type:
/playmusic <full_path_file_name>

you can also make an m3u listfile and specify that instead.