A good game needs a good story and making a good story is not that easy.
But I realized there are plenty of story materials out there, like D&D, super heroes, story books like harry potter.
I understand that many stories might hit that copyright issue, so a whole remake is imminent which might cause more work than intended.

But stories like D&D are kinda half done, they literally only describe the environment and the enemies, the players are supposedly to make up their own characters, how they interact with the adventures and how they defeat the enemies.
So this sounds like a good way to source free story for your own interactive fiction or does this still hits the copyright issue too?

And if you have used other source as your stories, was it a successful one?

D&D 5e has a core set of rules, etc. that come with a more open license. Last I knew they were freely downloadable from the sight because they just wanted people to start playing and get hooked. I went quickly and couldn't find them, but if you buy the starter pack, they very likely explain the license for use somewhere in the kit. You could also join popular fan sites that have "home brew" to see the kinds of things people make and publish. Some of them eventually get added to new things published by Wizards.

They want people to play and get hooked, because once you love the game, you'll be buying all the handbooks, monster manuals, special campaigns, etc. You should look into that.

Also, if you're looking to do something like a remake of a story, there are lots of Public Domain works out there which are famous that might be fun. Actually, while Disney will sue the pants off of anyone who goes near one of their works... many of their works are just remakes of Public domain. So you could do a version of Hans Christian Andersen's "The Little Mermaid" and as long as you stick to his version and don't go with the Disneyfied special stuff you could do any of those ones. Pocohantas, The Little Mermaid, Robyn Hood, King Arthur, Snow White, etc, etc all Public domain works.

You can look at the Guttenberg project https://www.gutenberg.org/ or Librivox https://librivox.org/ for freely downloadable public domain works from which you could build.

Pixie's CombatLib https://github.com/ThePix/quest/wiki/CombatLib might be a good place for you to start modifying if you're going to make a D&D ruleset. Pixie already worked out the dice rolls, I believe and has a good system for adding your own monsters. I didn't thoroughly check to make sure it sticks to the D&D ruleset though. So you might need to modify some if you're going that route.

Also, the real key questions to copyright infringement are:
Did you devalue their product in the marketplace in some way?
Did you make money when really they should have made the money?

There's a really fun video made by a professor of law from an IV league college that breaks down copyright and "fair use" a bit. Let me find it...

https://www.youtube.com/watch?v=CJn_jC4FNDo&t=543s

There it is. Been on YouTube for over 16 years without being taken down, and at one point was on Stanford's (if I remember correctly) website.

The rule book you couldn't find is at the below link, it is indeed free, but it expands more on character classes, spellcasting and enemies, which I can easily randomly think out of a few, but my real issue is that I cannot generate a story that actually makes any sense or fun to play with.

The 5E SRD is a subset of D&D rules that Wizards of the Coast has given anyone permission to use for free under the OGL. The 5E SRD is the most important Open Game Content, in fact, since it's the core rules of D&D that would otherwise be WotC's sole copyright to use.
https://dnd.wizards.com/resources/systems-reference-document

I did buy many of 5e D&D books, my family were united and played board games and D&D harmoniously during the virus years, but after the virus settles, everyone begins to disrespect each other and no longer play games anymore. How amazing that humans can unite under a grouped hazard but diverge so easily when the danger is over.

Before you ask me to play D&D with you, I have already resorted to just flipping the books and seeing fun areas and pictures only, the game rulings are unnecessary long time and difficult to play for me, but yeah I love flipping the books.

My ears aren't good so I am skipping Librivox https://librivox.org
I am just newbie at making games, D&D rules are too advanced and will delay my game building like forever, so I will skip
Pixie's CombatLib https://github.com/ThePix/quest/wiki/CombatLib

Guttenberg project https://www.gutenberg.org is finally what I am looking, it is indeed copyright free even though its navigation is hard, I will prove that I find something nice as below link.
https://www.gutenberg.org/ebooks/bookshelf/36
https://www.gutenberg.org/cache/epub/832/pg832-images.html

An interesting finding is that As a general rule, for works created after January 1, 1978, copyright protection lasts for the life of the author plus an additional 70 years.
This is important to me, because if it lasts only 10 years, then I might not feel protected by copyright to my stories, but luckily it does last long enough.

I have not make any of my textadventure pay to play and I probably will never, making games is my passion and hobby, milking money out of it seems to pour water over that "fire", especially if it makes little profit.

I did not watch the youtube, but judging by your comments, I guess copyright revolves around making money, and since all my games are free, I am safer under the radar.

Yes, mostly making money, but you can't give something away for free if people ought to be paying someone else for it. That's the "devaluing it in the marketplace" factor. But yes, copyright law is really mainly about protecting the creator's right to make a profit from their work before the world mass-produces it under other circumstances.

Are you looking for story idea?
Are you looking for help to flesh out a story?
A while back a group of us got together and made a group project.
We think it turned out good, but you could easily tell the different writing styles.
I have ideas... too many to use. If you what one, or a hundred, we can work something out.

The first page of my choose your own adventure is packed with story, but that's it.
Eventually the player fights random enemies, grind their loots and become stronger like all the boring mmorpgs that I have been influenced to.

Then the player finally slays the dragon, or be defeated, if he haven't grind enough.
So besides the first page, the 99 other pages are basically stories that have zero story entertainment.
I took a long break, possibly 2 years from making textadventure game because I am tired of learning to code, so this time I returned back and tried to learn how to make a story instead of learning to code, but it isn't working too well either.

It's good that you are willing to help me, but eventually I have to keep making games, so I have to come up with a permanent solution. But since this is my first CYOA that actually have a story, I will see if your story does help, if so, I will credit DarkLizerd.
_

In the tavern crowded with guests, your patience is soaked inside the liter of barley tea. You kept drinking it but do not feel replenished. Besides you are a group of adventurers boasting about their campaigns and spoils, because of what they had earned, their reputation soared to the sky, and you bet it is easy for them to gain friends and lovers. But the daunting truth remains, all of the missions have already been completed by this group of bean sprouts and other legends. All but one mission, the Dragon of Atlantis. This particular mission is so risky, that they say “To go into the island of paradise is equals to the seeking of death.”. Your greed pours in like water and your vision of a life with merrily friends and lovingly family takes place in your daydreaming.

You have spent most of your lifetime fixing shoes for a living. Bypassers steer away from as though you are unhygienic but the opposite is true, you always bacteria killing soap when repairing shoes. But no matter, the mere status of a cobbler have destined you to a life of friendshipless and romanceless. There is no point to fixing shoes anymore if there is nothing to be gained.

The dragon of atlantis slumbers at the top ice peak of paradise island, sheltered away from any challengers. The cold weather is enough to freeze the hot blood of bounty hunters. Yet, occassionally, someone still tries to do it, someone like you. Remember to claim the Dragon's tear to exchange for your reward of 1000 gold coins and upstanding reputation of being the dragon slayer. You are recommended to ask for more help in terms of companions or better weaponry. What should you do next?

Sip on the barley tea and concentrate: Turn to page 4.
Look around the tavern: Turn to page 101.

OK, so you're going with a story book. This works if you have a story to tell, And you have a very GOOD start!
I don't think there is much programing to a CYOA, just story and "go to page X".
2 thoughts...
1: rush through the story, create all the threads with notes to fill in later, then fill in the detail for each page.
2: write the story following 1 line of thought, with "other choices" not worked out. Then back up to a branch, and write that story line until you meet back up to your main line.
repeat step 2 till all threads are done.

My programming background is BASIC, and Quest is, to me, "kinda" like BASIC, if you stick with the "simple" stuff.
CYOA, I think, is a little easier than IF, which is more "move from room to room". Either can be used either way.
If I can "connect" with your like of thought, I can help you write some of the story lines.

About the coding, it is to hide my game rules and so people wouldn't copy it like this simpler version
https://textadventures.co.uk/forum/general/topic/duqbghkvc0_mqt6lri-_mw/can-i-license-my-game-rule-copyright-under-textadventures-so-others-can-help-me-s
Also with advanced coding, players do not have to manually count atk, hp and combat progress, loots in inventory, quests taken, a quick overview of players stats including attributes like intelligence 50 and skill activated bolt evade 500.

I have completed 100 pages of story and game, and it is short and boring, because it is mimicking mmorpg, slay random enemies and gain loots. Whatever enemies the player will encounter have zero relation to the dragon of atlantis, whatever, if it have no relation, at least let it be fun, so currently it is not fun as well unless you like killing random people.

I understand your 2 thoughts, however I am stuck at filling in the details and writing the story line, my brain is kinda attuned to real life, humans and logic. I remembered when I was young, I make stickman games based on clock monster, skateboard time traveller and aliens in suit, all these imagination is now gone. And if you think Dragon of atlantis is a not bad idea, it is stolen from my teenager self-written story as well...

My Squiffy games Dragonchoice: Candidate (https://www.dragonchoice.com/you-choose) and its minisode follow up Dragonchoice: Recap are fanfic based on Anne McCaffrey's Dragonriders of Pern. So completely unmonetisable. But they do a lot of the things being discussed here - tracking many (hundreds) of attributes, including shifting character traits and scores, inventory, random rolls combined with character attributes to see if you have the Strength, Skill or Savvy to achieve a task, etc.

At the end of Candidate your character can be exported and them imported into subsequent games using a code. Or retrieved from LocalStorage, but that's turned out to be less practical because people change browser, clear their history, etc.

Most of the complex stuff is the work of mrangel who has helped enormously with getting Squiffy to work outside the box!

Yes, that is exactly what I was trying to do, everything is automated.
I do not have the time to stress over coding, so I have to skip that for now.

But it is quite amazing that your game coding works flawlessly and its stats is very discernible, also, you actually have a website all by yourself.

It's not quite flawless, being a complex beast with a lot of moving parts, but we have a Facebook group of players coming up on 500 strong now, so we have a lot of people to draw on for testing.

It's also integrated with WordPress in various ways. The Squiffy game itself is integrated, and players can post their runs directly to the site, which creates a unique shareable page for each run (it uses an Advanced Custom Fields form to pass Squiffy data into WordPress). And the site also uses Ultimate Member to allow players to create their own profiles where all their runs appear, plus they can unlock achievements (both in-game and for completing various things across their profile).