If you do not own the physical disc, purchasing a used copy is expensive—often $150-$300 USD. For most players, emulation using a self-dumped ISO is the only feasible modern option.
: If working with the North American or European ISOs, "unlocking" or patching in the Maniac Mode (the hardest difficulty level cut from Western releases) is a popular project. 3. Gameplay Mechanics & Balancing fire emblem souen no kiseki iso