[dappa]

All I did to get excalibur was go to go the castle where there is a mother and child and talk to the mother. Select dragoons and she will give you the excalibur sword and then leave the castle with her son. This only works after gareth has died. I dont recall needing any code or anything like that

But if your already in the jade passage way you can get the masamune blade from pandaemonuim which is alot more stronger.