Valkyrie no Bouken: Toki no Kagi Densetsu

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Valkyrie no Bouken: Toki no Kagi Densetsu for the Famicom is Namco's response to The Legend of Zelda with its open world RPG gameplay.

Developer Credits#

The game contains hidden copyright text:

COPYRIGHT 1986 NAMCO LTD.
ALL RIGHTS RESERVED
A.WACHI

Checksum test#

This game contains Namco's cartridge self-test routine. The "special data" used to verify the device is present is 32 bytes long, at $FFD0:

B7 BE AD AA B7 B6 AC BE D1 AA BB BE B8 BE A8 BE
DF D9 DF B4 AA B2 B6 D1 B7 BE B1 BE B0 B4 BE DF

When XORed with $FF, it becomes this plaintext string:

HARUHISA.UDAGAWA & KUMI.HANAOKA