During my travels I have come across two hidden events, what seemed strange to me is that when I reloaded a save before one of the events, the event was no longer there. I decided to investigate this in the game-scripts and managed to uncover 9 hidden random chance events throughout the game-world.
This will be a guide showing the location and explaining a bit about how to trigger those events, as well as some other random things that might be interesting (drugs, monster-capturing, etc.).
Hidden Events:[]
Hidden events are invisible, whether they're on or off, every time you enter a map (area) containing one there's a chance it'll be "turned on" - what that means is that if you walk over the invisible event-block (a square on the map) the event will start.
If you enter the map (area) and the event is not in the "on-stage", walking over it will not start the event.
I will not give the exact percentage for every event to enter the "on-state", basically they all have a chance of entering the "on-stage" between 6.6% (a random number between 0 and 15) and 20% (a random number between 0 and 5).
When you enter the map (area) and you're lucky, the event enters the "on-stage" and all you have to do is to walk over the specific invisible square on the map.
Keep in mind that most of these events can only be triggered once - once you view the event it's gone.
Here are the locations of the events I discovered with screenshots of the event-squares (marked with red):
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Player Castle 2nd Floor Corridor (next to your room).[]
This event is the only to have 3 squares - basically when it's in the "on-state" walking across the intesection next to your Room (to the top-right) will trigger the event.
This one will probably be the quickest to trigger - since you can enter another room and retry.
This one is a karma-event (good/bad choice), I recommend the bad choice as the good one just stops the event.
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Player Castle 1st Floor:[]
When entering the Museum after having rewarded your Priests with sex at least 4 times (I triggered it at 4 but could be sooner). The reward has to still be going on (the girls are still in Castle).
Player Castle 2nd Floor:[]
There are 2 events that have a random chance of auto-running (start when you enter the room) on the 2nd floor of your castle. The rooms have to be fully upgraded.
Event 1: When entering the Rectory after having rewarded your priests with sex at least once (15000G). The reward has to still be ongoing (the girls are still at the castle).
Event 2: When entering the Corridor after having rewarded your priests with sex at least 3 times (3*15000G). The reward has to still be ongoing (the girls are still at the castle).
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Rei-Long Oak by the ship (on the pier):[]
I recommend saving before triggering this one, as it has 3 different versions - picked at random and after you see any of them, the event will vanish.
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Rei-Long Oak East town:[]
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Capital Church District by 3 houses:[]
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Capital Church District by bald woman from Detective Kidnaping Case:[]
(directly below 3 houses)
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Capital Church District next to weapons shop:[]
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Capital Warehouse by bookcases:[]
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Capital Slums West under Stolen Necklace target:[]
This one is a karma-event (good/bad choice), I recommend the bad choice as the good one just stops the event, and trust me - not stopping them is the better choice - she deserves it.
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Capital Slums South by the water:[]
This one has two variants - picked at random when interacted with.
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Ceeves Ocean (Hospital)[]
2nd floor from the left side of the room, you get a dialog box
you can investigate, or leave,
Other Interesting random events:[]
Cheating Family:[]
After Kin (complete Rei-Long Oak Soldier's Letter quest) is back home in Everlight, there's a random chance that she'll be out of the house (a number between 0 and 7) every time you re-enter the house which will trigger a new Event chain with her parents.
There are 2 events that trigger randomly (when you enter there's only one NPC in the house). If you have sex in both events, a third one will trigger some time after outside your Castle (this one isn't random, but I don't know how long it takes for it to appear there). HINT: There should be a Painting at bottom floor of Museum. Activate painting. Seems the last scene isn't finished yet since you can't finish it.
Succubus Virginity:[]
Changing your outfit to "Dark Warrior" (use wardrobe in your Room in your Castle), has a 5% chance of triggering a scene with a succubus - re-enter the room with that outfit on over and over.
Taking Drugs:[]
The most obvious one here would be taking drugs (can be purchased in the Capital) - there are over 10 different events (picked at random) that include fights and rewards.
You can safely lose any of the fights (though 2 of them will claim your anal virginity) and 2 of the 3 fights (if won) have a Capture Event (see below for Capture Event).
Some of the events will lose you some money, while others will gain you some.
There are 2 H-scenes. As well an event that can give you one random "Drug Session" adult painting (4 in total).
Carries Mansion (Random Event + DumDum Capture):[]
If Carrie survives the "In the army..." Event Chain, you can travel to her Mansion with the small boat in Rei-Long Oak. There you'll be greeted with a chance for some sex. Inside the Mansion there a 50% (easiest to get) Random Hidden Event when entering the Eastern Corridor (just walk all the way East inside) - like all the previous R.H.E. - just re-enter the house if it doesn't trigger.
On the part of the map with the boat (where you arrive) there's a 20% chance a DumDum (or something) Orc will spawn by the palm trees on the West side. If you defeat it there's a 100% success Capture Event (see below) - this one is 100% - meaning you don't have to kill him over and over to succed.
Giant Frog:[]
Once you're able to travel to Fuar, go all the way North of Everlight (by the tent with the first NPC you meet), then enter the pathway to East of the tent. Right next to you there will be a waterfall. There first time you enter there should be a Giant Frog under it. Once you kill it, there's a 5% chance a new one will spawn every time you enter the map. When you beat it there's a Capture Event (see below).
Slimes:[]
In Everlight North forest (the one that had bees in it), there's a random chance spawn of a single Slime. I believe that the first time you enter the forest it will always be there. Once you kill it there's a 2% (a number between 0 and 50) chance of a new spawning (there are 4 different colours). The Slimes (and a couple of other monster I have yet to encounter) have a Capture Event (see below).
Capture Event:[]
When you defeat a monster with a Capture Event, you'll be given a choice to capture it.
You need to have a Castle (and max-upgrade Guard Room for the Drugs ones) in order to even begin capturing.
When picking the capture option there's a 2% chance (a number between 0 and 50) of successful capture. If succeeded slimes go to the Northern part of castle - speak with animal caretaker outside North to go there. And the Drug Event ones go to the Jail below Guards Room.
Sealed Chest: []
Go down into the Storage Area in the Castle and in the corner is a Sealed Chest. You can read the Note and everything but break the Seal and a Demon Woman appears and fights you. After you win you get some Pictures as well as having to watch back. Might be more to this later.