CPS-2 Encryption Scheme Broken
The CPS-2 arcade board from Capcom uses some hard encryption scheme that
has been a very hot issue in emulation for years. Yet finally the code was broken Final Burn, a
quite recent arcade emulator, showed concrete results by running previously unsupported games
such as Street Fighter Zero using decrypted ROM images. The CPS-2 Shock Team, who managed
to reverse engineer the process for scratch, really outdone themselves and it is a very uncommon achievement. There's more info here as well.