then playing on PC is perfectly legal for personal use.
Since Tekken 3 was originally a PlayStation exclusive, you need software that mimics the console on your computer. : play tekken 3 on pc
You can fight your friends online using or the standalone Mednafen emulator. Both support synchronizing input delay. Note: Tekken 3 is not rollback-native, so play with players in your same region for best results. then playing on PC is perfectly legal for personal use
To play the arcade ROM: