What is Gamemode 4? Edit
Gamemode 4 is a collection of Command-Block modules created by Accidental Games' Sparks, and other module creators, that modify and improve the vanilla Minecraft game-play experience without the use of mods.
There are four ways you can use Gamemode 4 modules: Download a new Minecraft world with the module pre-installed for you, install the module using the 1-click install, download the module as an MCEdit Schematic file, or download the module as a structure block file (1.10+). Most modules have most of these options available.
Types of Module Edit
There are currently five types of modules:
Stand-Alone Module Edit
Stand-Alone modules are just that - you can insert any of them into your world and they will work right away, they're completely self-contained and require no other modules to function. Currently the majority of the Gamemode 4 modules fall under this category.
Base Module Edit
Base Modules don't do much by themselves, rather they provide a base platform that other modules can use and communicate with.
Reliant Module Edit
Reliant modules act like stand-alone modules, adding new elements to your gameplay, but require a base module to properly function.
Expansion Pack Edit
Expansion Packs add functionality or new elements to another module.
Module Pack Edit
Module packs are similar modules bundled together to save space and reduce lag by sharing clocks etc. They are designed to reduce lag if people wanted all of the modules in the pack and to make their installation faster.