The last update of Desperados III enabled players to modify and design custom levels using the built-in cheats. This page serves as a short introduction on how to do this. For more information see also the official tutorial which includes a small video series on how to get started with the level editing cheats. You can also find levels created and shared by other people on desperados.mod.io.
To share your level you can now simply copy this file and send it to somebody else. You can also upload it to the official level sharing site desperados.mod.io. The site contains a guide on how to do this. Other players can then move the save game into their save game directory and load it from the main menu like any other save game.