To illustrate the problem of your much ignorance-at-work, let's use some popamole and populist examples. I hate to use them, but anything higher level than that will get your eyes crossed and your mind blanks.
Take Romance of Three Kingdom setting. This is an historical setting, which is the basis, the base for everything else built upon.
Manga, manhwa, and chinese language comics are full of derivatives about them. They are not the same, or people wouldnt buy them. I will not bother to list them here since we would be at it all day.
In games there's no basic version of ROTK. All of them are derivatives from the ROTK history version, which is based on two or three different books, and two most popular TV shows in the 80s and 90s.
++ Take Dynasty Warriors series, with the latter tittles more and more outrageous than the earlier.
++ Take Sengoku Warrirors series. non-Japanese play them because they are derivatives of ROTK, you can imagine playing in its much-different yet much-similar setting.
++ Okay, you can argue the ROTK series follow much closely to the historical version, the basic version. But it's still derivatives.
In film the derivatives are worse, both literaly and figuratively.
Period. Now for another, much higher level.
You should have heard of Journey to the West setting. A monk, a monkey, a pig, and a river monster (plus a horse) go to West to bring back Buddha's scripture.
Now remove the main characters, leave the setting behind. It is that setting that has so much derivatives about it.
You have kingdoms of humans dealing with monster in all form of evolution.
You have advanced humans dealing with monster, or with kingdoms.
The other above, but instead in medieval setting, move to modern setting.
The other above, but instead in medieval setting, move to much more farther, post-modern setting. Kinda, monster civilization in future, and advanced human civilization in non-SF setting.
Take Prince of Qin game, and Jade Empire. They can be considered to be advanced humans dealing with monster, or with human kingdoms in Qin-Han period.