Hmm, if it's a source file you might have to configure and compile it first.
But why would you play tibia from a live cd? The BackTrack CD isn't mentCode:./configure make && make install
to be played games on except if you're going to play tetris in SSH or something
else like that. ( i tend to do that when i'm bored )
PS: To play windows games try cedega. (it supports directx)