Wassup I'm new to extracting files from video games but I'm trying to learn how. I want to learn how to extract and code in general so that I can do this with any game that I want. I've watched a couple of tutorial videos on Youtube and this is the process that I've figured out so far: 

1. Download Hex Editor

2. Download the game that you want

3. Extract files with 7zip to get the files that you are trying to extract (Ex: character models, stages, UI, Etc.)

4. Open file with hex editor to see what the file types are inside decompressed files (Ex: .dat, .fpk, etc.)

5. Go to Quickbms to see if the file extractor has already been created

6. If not, then you have to create and code the file/tool yourself <----- THIS IS THE STEP IM STUCK ON. I DON'T KNOW WHERE TO CODE

7. Use the file to extract said data from the game you chose

8 The End

EDIT: If I'm missing any steps can someone offer some advice? Thanks in advance

 

1 hour ago, thewinnersproject said:

6. If not, then you have to create and code the file/tool yourself

Maybe try to learn from tools that already exists. See the source code shared by other people, analyze what is going on in the code and try to recreate the logic.
Here are some examples https://github.com/bartlomiejduda/Tools

 

But to be honest, creating tools is an easy part. 😄 You should really focus on "Step 4" from your list, so basically you should learn how to reverse engineer file formats.
Here is a good place to start https://reshax.com/topic/47-reverse-engineering-tutorials-collection/