Stranded II supports not only the creation and editing of maps, but also gives you the opportunity to modify the game itself. You can make your own objects, creatures and items and specify how they have to behave and much more.
The "new" games that result of what you change are called modifications, or shortly: Mods.

What do I have to pay attention to?

If you want to make your own mods, keep in mind that the time and experience you need to create them is considerably higher than for making maps. After all, mods are complete games on an existing engine.
So before you start to make a mod, you need to have become familiar with the creation of maps and the writing of scripts in Stranded II. Both is required to make good mods!

• II. Create a mod folder