*.mdf

[amunimanghi]

i downloaded a game and the format is *.mdf. how can i open it.

[mazelado]

You could try KIso. It's not in the Ubuntu repositories, but you can get it here:

http://www.kde-apps.org/content/show.php?content=10176

As of version 0.8 you can convert MDFs to ISOs, which are much more readily supported.