Some new stuff:
I tried looking into encounters, and sure enough, Sui2 uses a "danger value" system similar to a lot of other RPGs, such as Final Fantasy. Basically it constantly counts your steps, and the higher the step counter goes the more likely you are to get into an encounter. I don't have the specifics of how it uses the RNG for this, but having a max danger value (255) does not guarantee an encounter on the next step. It just makes it pretty likely. However, the game also has a "grace period" system where you have to take a certain number of steps before encounters will "activate" for an area. The amount of steps changes by area, but I think I have logged most of them below:
Code: Select all
Area Step Grace
World Map 30
GH-Matilda Forest 50
North Sparrow 50
Muse 1 30
Cave of the Wind 80
North Window 70
TR Sewers 50
GH Forest 1 50
Banner Pass 60
Tinto Mines 80
GH Forest 2 70
Rockaxe Castle 15
Tinto Pass 50
Rakutei 2 70
World Map (Lakewest) 50
Kobold Village 40
Some other things to note:
-Leaving an encounter or changing screens resets the step counter and danger value to 0.
-The danger value remains at 0 until you have taken a number of steps equal to the grace period.
-For whatever reason, the Lakewest region is the only region on the World Map with a grace period that isn't 30.
-Stallion just increases your speed; grace periods last the same distance when using him on the World Map.
-There are some instances where the danger value will freeze (ie, no encounters). In some places this is intentional (door before Double Head) but some others they can't be explained well (some areas of the World Map).
-I didn't get a chance to test Rakutei 1 or Muse 2. As far as I can tell, they should be the same though.
-Greenhill Forest is broken up by region. GH Forest 1 is the region you can visit during the initial escape with Theresa. GH Forest 2 is the region when liberating GH. The rates switch as you change the actual area and are not connected to the storyline.
-A number of individual rooms have encounters turned off for no reason. A lot of these are in Tinto Mines, but there are a few spread throughout other dungeons as well.
EDIT: For the technical folks, the step counter is at RAM address 0x02566E and the danger value is at 0x02566F.