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SadisticMystic | Sonic Adventure 2 - Aquatic Mine - m5 - 0:22.34 @sadisticmystic | Uploaded June 2008 | Updated October 2024, 21 hours ago.
The bad news is my prediction of 28 seconds for an ideal path on the level, made a year and a half in advance, doesn't hold up after all. But the good news is we get this.

As you know, the old 27.72 chained 3 into 1, getting them at about 6 and 15 seconds respectively. That represents a 9-second piece 1, which, given the new 3 strat proves you can get to the Chao under 7 and piece 1 is right by the Chao, doesn't really cut it anymore. Clearly there was improvement to be had.

Note that the new breakout technique appears to work on just about every water level sign that's up against a wall, in the whole level...EXCEPT those touching the front walls (closest to start). So I knew what to do for 1, and 3 hasn't really changed at all despite the constant evolution of strats in AM, but figuring out the best way to handle 2 was the big problem. It was almost certain some improvement could be made over the 27.72, but what?

blazest provided the answer in a demonstration video of his attempt at porting the Chao strat into hard mode. The crucial facet there was chaining 3 into 2: given that 3 into 1 no longer makes sense, the orphaned 3 is now free to form a chain into the other remaining piece. Yes, that particular spot for launching a breakout is comparatively worse at getting 2 than it is at getting 1, but the fact that as far as the timer's concerned, I'm getting a flying start from piece 3 (closer to the wall and higher up) rather than a standing start from, well, the start, means it still works to subtract a couple more seconds from the old prophesied mark.

This path seems even more difficult to streamline than the last path I took through this mission, so when everything's optimized I can see this going to 20.50 or maybe even lower.

It has now been determined that the fan breakout (collisions not being detected while in ledge grab animation) doesn't work on GC. However, you can drop down and use the water level sign on the left wall instead, regardless of system (note that if you approach it from the level start, you have to turn around after breaking out to be in line for piece 2). See where that gets you.
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Sonic Adventure 2 - Aquatic Mine - m5 - 0:22.34 @sadisticmystic

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