How to make a Kerbal Space Program Mod?

[Mr. Quark]

There are not any instructions ( That I know of ) that say how to make a mod, not adding parts, just changing the gameplay other than parts. Can someone please help me on how to make a mod?

[Rocket In My Pocket]

You'd have to be a lot more specific about what you actually wanted to do.

But in a vague sense it's mostly about editing config files and such.

[Snark]

Here's the forum you want, @Mr. Quark.   Of particular interest is the "Plugin Development Help and Support" sub-forum.  It has lots of helpful stickied posts with various types of help.

http://forum.kerbalspaceprogram.com/index.php?/forum/36-add-on-development/

Broadly speaking, there are two things you can do:  change/add config, or add code.  A given mod might be only-config, only-code, or some mix of the two.

Tinkering with config requires a text editor and a familiarity with KSP config syntax.  It allows altering the parameters of the existing parts in the game.  If you can use some external tools such as Blender and Unity to add models as well, this lets you add new parts to the game.

Tinkering with code allows you to write new computer code to make the game do new and/or different things-- it gets at the behavior of the game itself.  (Mods that have code in them, like this, are referred to as "plug-ins".)  To make this sort of mod, you'll need Visual Studio (it's free) and a knowledge of C# programming.

The forum I link to above has all sorts of information about this kind of stuff. For further modding questions, that's the place to ask.

[Vanamonde]

Your thread now occupies the modding development subforum.