In the original Tekken 3 arcade machine, time-release data dictated when secret characters became available. The game tracked operational hours via the NVRAM clock, gradually unlocking characters like Kuma, Julia, Gun Jack, and Bryan Fury to keep players coming back to the arcade.
import nvram
Use of BIOS, ROMs, or copyrighted game files should follow applicable laws and ownership rights. Back up and use saves from legally owned copies. tekken 3 nvram