Game:

Jet Set Radio Future (2002)

Duration: 3:54

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11

Read on in the description for some extra trivia.

This was largely spurred by hearing about a modified JSRF save going around with all the character unlocked from the beginning, where some lamented that Yoyo was still unusable for much of the game. Here, we'll see precisely what locks Yoyo from play and how to get around it.

First, for the sake of correctness: I look at individual bytes from the action records, but the action type is in reality a 32-bit integer, and the argument is a whole 64 bytes. How much of that argument is actually used depends on the action type, including using none of it. All the numbers we talked about here fit into individual bytes, though, so I truncated to make things easier to follow.

For the sake of time, I didn't play through the game to get any of this footage, but instead just swapped mission files around to get where I wanted to be when starting a new game (sometimes creating "new" ones that the swapped ones cause the game to search for). The one problem was that this meant I'd only have the starting characters unlocked after the cutscene at the start of the video, so I actually modified the cutscene's mission file to unlock everyone you'd usually have at that point in the game. Specifically, I added a new action list at the end of the file, with a D6 action for each character I wanted, and modified the so-called "table of contents" to point to that list instead of the original one.

You also might notice that Yoyo loses his voice in the Immortals fight. I believe this is the same bug encountered in some versions of the game where NT-3000, Yoyo, and Roboy can lose their voices under certain circumstances, caused by the game unloading the character's voice while you're playing as them. In this specific case, the opening scene of the Immortals fight loads Yoyo's voice, because it's in the same mission file as the post-fight cutscene which plays Yoyo's laugh as you're captured (not NT-3000's, interestingly). The actual fight then happens in another mission, and I believe the game unloads Yoyo's voice as you go from the first mission to the second as part of unloading all the other stuff the first mission had loaded.

I originally planned to explain the E3 action type as another example, but left it out for time and because I figured the C5 example with music was enough. E3 plays an "event," which is basically a short scene, and its argument is the ID of the event to play. The argument E6 to the E3 action in the video is 230 in decimal, and plays e230.bin. The cutscene is actually composed of four such events, though, numbered 230-233, and there are other lists of events that also contain E3 actions with arguments E7, E8, and E9 for the other three events. If you replace the E6 in the video with E7, for instance, the cutscene starts with the segment about Yoyo going missing (and then softlocks because of some machinery I don't quite understand yet).

I was thinking it'd be really funny to include the secret "even I wonder if I'm the real Yoyo" line from FRZ, but I don't know of any way of triggering it without further modding the game, so I left it out. Its obscurity might leave some people confused, anyways.

Finally, if you'd like to see my ongoing collection of information about the workings of this game and development utilities to examine and modify it, I'm frequently toiling away at this repository: https://codeberg.org/KeybadeBlox/GG-Notebook

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