[Casimiro Notevi]

Realmente no tiene mucho que entender, imagina que en lugar de un .xml fuese un .ini

[game id="005"]
source="mamedb.blu-ferret.co.uk"
path=./005.zip
name=005
desc=Agent 005 brings new cash collections to you. His mission is to deliver secret attache cases to an awaiting helicopter.
rating=0.618
image=/home/pi/RetroPie/roms/arcade/boxart/005.png
marquee=/home/pi/RetroPie/roms/arcade/wheel/005.png
video=/home/pi/RetroPie/roms/arcade/snap/005.mp4
releasedate=1981
developer=Sega
publisher=
genre=Maze / Shooter Small
players=2

[game id="10yard"]
source="mamedb.blu-ferret.co.uk"
path=./10yard.zip
name=10-Yard Fight (World, set 1)
desc=North American release. For more information about the game itself, please see the original Japanese version entry;
rating=0.471
image=/home/pi/RetroPie/roms/arcade/boxart/10yard.png
marquee=/home/pi/RetroPie/roms/arcade/wheel/10yard.png
video=/home/pi/RetroPie/roms/arcade/snap/10yard.mp4
releasedate=1983
developer=Irem
publisher=
genre=
players=2