Tf2? hows the most dramatic/stupidest way a group can kill each other and commit mutual destruction. Also here's a fish in regular and festive versions to beat people up with.
Actually, the only thing that wasn't stolen at the Louvre's Apollo Gallery is the Regent Diamond, figure no one would take it because something to do with a curse.
I've also found that the two thieves were leaving for Algeria, thanks of a trace of DNA evidence recovered from a helmet and their past in burglary cases according to the police.