what type or kind of program is use to edit or make game system files in the system folders of an online game?

Corrina Faro: your question is not specific enough, any game coder can make there own 'system' files and put them where ever the game will read them from. every game is different, and very few games use the same files.(with the exception of directx games) online java games usually have all the code in one file, and pull the gfx and snd from a web location.windows games usually put gfx and snd in dll's or in the exe it'self.game saves are coded however the coder figured to do it at that time. the game it'self makes the files, or the install program, or it's already distributed with windows......Show more

Coy Tapley: A file editor is used. Usually game programmers code bespoke applications to help in further development.