FoB is a game where you swing bulls to defend yourself against incoming hordes of...other bulls!
This is the Windows release of FoB. It should work on both 32- and 64-bit.
This is the Mac release of Fistful of Beef. It'll work on both PPC and Intel architectures.
This is Fistful of Beef for 64-bit Linux. amd64, that is.
This is Fistful of Beef for 32-bit Linux. i386, that is.