| Region | Language | Violent Content | Difficulty | Notable Changes | |--------|----------|----------------|------------|------------------| | | Japanese / English | Full red blood, uncensored fatalities | Default | Home mode: Samurai Shodown II beheadings intact. | | USA | English | Green blood, removed gore | Harder (default coin settings) | Mortal Kombat -style content reduced. | | Europe | English / multilingual | Same as USA | Hardest (longer attract mode, faster difficulty ramp) | Added language screens for Germany, France, Italy, Spain. |
When a cartridge was inserted, the BIOS would perform a handshake. If the encryption or the specific timing of the cartridge's response was incorrect, the system would refuse to boot. In the late 90s, pirate cart manufacturers found ways to bypass this by "piggybacking" legitimate chips or reverse-engineering the BIOS logic. This cat-and-mouse game between SNK’s BIOS updates and bootleggers is a legendary chapter in hardware security history. neo geo bios