So I made something that I'm surprised no one made before. Unlocking those hidden items of Castaway Stories in buy mode. Like the pirate ship from Wanmami's Buccaneer Cove, or the waterfall from Shady Lagoon (I don't think many people will need this in 2020 but well).
Anyway, I'm sorry if this isn't the right place to share this stuff. I wasn't sure, since there's no downloads section for the Stories series.
I enabled a total of 32 items (even though 10 are portals, so I could say 23). For the list of items and what you can do with them, see below. I divided them in 2 categories/folders. Some of them have proper names and descriptions, which is kinda sad, probably they originally planned to include them in buy mode.
Download:
Get "CS buyable hidden objects.zip" at the bottom of the post. I uploaded all files there, so I detailed the file name for each object in the lists below, so you can choose which ones you want in your game.
Installation:The collection is a must! Copy the "HiddenObjectsCollection" file here: Documents\Electronic Arts\The Sims Castaway Stories\Collections
You may not have the Collections folder, then create it. Don't forget the 'C' in upper case, or it won't work.
For the objects, read the 2 lists below to know what's included in each folder, and choose the ones you want from any (or both) of the folders, then copy them in: Documents\Electronic Arts\The Sims Castaway Stories\Downloads
Same as before, create Downloads if you don't have it. The Waterfall file isn't necessary, read below about it.
Where do I find them in game?
I put them in a collection because the catalog sorting in CS is a pain and I didn't feel like researching which number is for each section. So they won't appear in the catalogue, they will only appear in the Collection (thanks to this tuturial). Collections are accessible from build mode.
Now finally, the list of items
Chalice of Days
Yes, the chalice that is in the House of Tuzu that you can use to bring an elder Sim back to adult. Now you can have it in Wanmami island too, or maybe in your home, but that will be expensive.
Price: 32767 (It's the max possible price apparently. I wanted to make it even more expensive.)
File name: ChaliceOfDays
"Moving Too Fast" Waterfall
This is the in game name of the waterfall from the Shady Lagoon. To place it, you need at least 1 tile of water (see image). But this only works with water placed in build mode, you can't put it in beach water. That's why I made a modified version which can be placed in beach water too (technically you can place it in land too but I don't see why you would do that ). This one is the version included in the "Cool items" folder in the zip. If you want the unmodified version, remove the "Waterfall_PlaceEverywhere" file and use the "Waterfall" file instead.
I basically looked for one of the petrified logs deco in the game data, these can be placed in any terrain, no matter if it isn't flat or there is water. So I took the "Function - Init" from it, then added it in the waterfall package.
Price: 33 (it looks too cheap but it's the price that was set in the data already)
File name: Waterfall_PlaceEverywhere
Frigate About It
The pirate ship you can find in the Buccaneer Cove in Wanmami island. To place it, you only need a flat tile in the landing of the stairs. Now you can have it in Felicity Island... maybe. The problem is that it can't be rotated. For reference, the screenshot is in the Village Residence. The only place where (I think) it looks good is in the Abandoned Research Base, but you know, a pirate ship doesn't really fit the abandoned base theme. I wish I knew how to modify it to be able to be rotated.
But maybe...
maybe if I rotate the lot with SimPE, then enter and place the ship, and then rotate back? I have to try it.
This ship is pretty much the same as the one in Sims 2 BV. Except that the ghost doesn't appear, not sure if that's a bug. There are a lot of interactions and you can enter the cabin and randomly find 3 different items.
Price: 32767
File name: PirateShip
"Scribal Knowledge" Bookcase
The same as the career reward bookcase from the Sims 2, but with a different name and description, which makes me think that they originally planned to include it.
Note: This object is unlocked in buy mode here. This download includes other career rewards that I decided not to include because, unlike the bookcase, it looks to me that they simply forgot to remove their data (like with the Ottomas and Ramaswami families in the hood data). If you have this download, remove my bookcase file.
Price: 2000
File name: Bookcase
The Forlorn Tiki
Spaulding. That's it, that's the post.
Price: 305
File name: Spaulding
Mysterious Gem
Yep, the missing piece of Spaulding's head. You can buy it, pick it up with your Sim, and then put it in him, that is, if you want to get the disease back. (Now seriously, your Sim does get the disease after putting the piece in its place. Your Sim won't die in 3 days like in the story, but they will stay sick forever until you use the medkit.) Spaulding, why are you like this?
Price: 25
File name: SpauldingGem
Medkit
The one you find in the Shady Lagoon. You can only use it if your Sim has the disease. Maybe for deco too.
Price: 10
File name: Medkit
Pyramid Door
The door from the House of Tuzu. You can open it with with the staff but you can't close it. So it's basically the same as the pyramid ruins arch that comes with the game.
Price: 1600 (the arch is 1150 so I added 450 for the door )
File name: PyramidDoor
Crashed Ship
This is a pretty interesting item. It's the crashed ship you can see in the first beach. When you place it, it's just a small 1 tile rock, but if you look outside the lot, there it is, the enormous ship that crashed between those enormous rocks. You may have to rotate the rock to see it.
Price: 10
File name: CrashedShip
Wishing well Well, it's in the game data and it works, so why not? All 3 wishes work, from what I tested, but you can only wish once, then the only interaction will be "Drink".
Price: 2500
File name: WishingWell
Urn altar
The altars where you have to put the urns of the ghosts in the forbidden village. I guess you can place any urn here, but I didn't kill any Sim, so I only tried with a random urn from no one that appeared from nowhere when I selected "Place urn" with allmenus cheat activated.
Price: 10
File name: UrnAltar
Temple altar
It's the altar where you have to place Spaulding. You can only put him here if you have allmenus cheat, which is lame, but I guess it works for decoration too.
Price: 10
File name: TempleAltar
"Surprise!" Big Crate of Mystery
Not sure what's this but it has a proper name and description. In the game data, it's called "Airport Crate - Machete". It looks exactly like the airport crate, you can only open it with allmenus, and when you do, you get a machete. It makes sense, I guess, except that in the story you get the machete digging in the sand.
Price: 100
File name: AirportCrate
Buried chest
The chest you find buried at the beginning of the story. You can place it, then dig it out with your Sim, and you get... yes, you get the chest.
Price: 15
File name: BuriedChest
Buried crate
There's a big and a small one. All you can do with it is dig it out. Normally you get nothing, but I think it depends on the lot you are in. (For example, the Village Residence had a big crate with the electricity tower, so if you buy another crate and dig it out, you get the tower again.)
Price (small crate): 12
Price (big crate): 20
File name (small crate): BuriedCrateSmall
File name (big crate): BuriedCrateLarge
Ominous Portal of Implicit Doom
Nice name, right? It's the door that opens after leaving Spaulding in the altar in the story. The only interaction, and it only appears with allmenus active, is "open", the door will open like in the scene of the story, and then you can't do anything with it. You can't even sell it. There's a portal that looks exactly like this door. I guess that this object is only used for the open animation and then replaced by the portal, or something.
I included it because it has a unique name and description. Not sure why they even considered putting this in buy mode.
Price: 10
File name: TempleDoor
Petrified tree with staff
Simply the tree where you find the Staff of Tuzu. Not sure why I included it. You can only pick up the staff with allmenus on, and only if the Sim doesn't have the staff already. And that's it.
Price: 10
File name: TreeWithStaff
Parachute rope
The rope you find in Shady Lagoon. You can pick it up with your Sim and it goes to the inventory. You can place it back. What you can't do is grabbing it from buy mode.
Price: 80 (it was already set, I didn't want to change it)
File name: ParachuteRope
Chapter Rocket
Looks like a test item that is supposed to bring you to the different chapters of the story. The menu seems to be broken unless you use it with allmenus activated. But even with it activated, the only thing I achieved is visiting the lot where the chapter takes place. They don't give me the mission I had to do. So I'm not sure if it has any use.
Price: 1
File name: ChapterRocket
Story Text Tester
Another test item, apparently it only shows the dialogues of the chapter you choose. You could use it as replacement for Spaulding, as this one has the gem in the head already and doesn't make your Sim sick.
Price: 1
File name: StoryTester
Spawn point
Have you ever wondered what's that rock you can't move in your Village Residence? It's like 10 tiles away in front of the portal. Well, it's the spawn point. It's the place where your Sims appear when you move them to the lot. I found out what it does thanks to a bug I had when I made Shady Lagoon a residential lot. I tried to move a family there but it never finished loading, apparently it was because of the spawn point. There is one already, but it wasn't working properly, so I placed another one and it worked.
Price: 1
File name: SpawnPoint
Portals
The portals are those things you use to move to another lot. There are 10 different ones, so I included them all in the same file. Some of them can be used normally (the only interaction just opens the map), others don't have any interaction. They can't be picked up after placing them.
Price: 2 (all of them)
File name: Portals
WARNING
Backing up your save games before getting custom content is always recommended, but be specially careful using the test items, they are test items after all. And with the spawn point too, I don't know if having more than one in a lot can cause side effects.
Also, most of the "not that cool items" can't be picked up/deleted after placing them. So I highly recommend you to get the Stuck Object Remover here (it will appear in Nature section). With this, you can get rid of them, in case you went to live mode after buying one. It's a very useful tool for removing locked items, since there's no moveobjects cheat.
If you prefer, I made a modified version of the Stuck Object Remover that can be placed everywhere (the original one can't be placed in sloped terrain or in water). May be useful because, again, no moveobjects in this game.
Note: I mentioned the allmenus cheat quite a few times. If you don't know what it is, check this page.
This is my first serious post. I hope I didn't mess up. And I hope someone finds this useful!
Update: Silly me made the Stuck Object Remover not placeable on floor when I made it placeable in sloped terrain. I fixed and reuploaded it, now it is really placeable everywhere.
Sign in to Mod The Sims
24th Jun 2020 at 1:48 AM
Last edited by Borja20 : 3rd Jul 2020 at 1:53 AM.
Reason: Reuploaded Stuck Object Remover
CS hidden objects buyable
Download: 
The Waterfall file isn't necessary, read below about it. 
). This one is the version included in the "Cool items" folder in the zip. If you want the unmodified version, remove the "Waterfall_PlaceEverywhere" file and use the "Waterfall" file instead. 
I wish I knew how to modify it to be able to be rotated.
(Now seriously, your Sim does get the disease after putting the piece in its place. Your Sim won't die in 3 days like in the story, but they will stay sick forever until you use the medkit.) Spaulding, why are you like this? 
So it's basically the same as the pyramid ruins arch that comes with the game.
You can only pick up the staff with allmenus on, and only if the Sim doesn't have the staff already. And that's it.
Update: 
I fixed and reuploaded it, now it is really placeable everywhere.