There are numerous substories in Like A Dragon: Infinite Wealth for earning unique rewards, learning more about the interesting characters of Hawaii, or just having a fun time beating hordes of “threatening men”. Although most substories are unlocked progressively as players play through the main story, there are a few like Experimental Procedures which have specific requirements to trigger. The guide below will take a look at the unlock requirements for Substory 51- Experimental Procedure and what steps the players can take to earn the rewards for completion of the substory.