The first step to a mod   ModsAPI is not active in the client by default. You need to add a "PnFMods" folder to the game directory "World_of_Warships/res_mods/<game_version>" to activate it. Then you need to put an empty Python file "PnFModsLoader.py" to the same directory "World_of_Warships/res_mods/<game_version>":   The "PnFMods" folder should contain folders with mods:   The simplest case is when a mod consists of just one file: "Main.py". Therefore, the simplest possible mode can be located at: "World_of_Warships/res_mods/<версия_игры>/PnFMods/TestMod/Main.py". ModsAPI consists of two parts, Python and Flash. The Python part is responsible for loading Main.py, and the Flash part loads a specially prepared Main.swf. Python and Flash parts of the mod operate separately from the game client. The provided interface is used to receive and send various data.