rmmzsave files are . Anyone can decompress them (using a simple pako-based script) and read all player data: gold, items, switches, variables, map positions, event progress, etc. This makes it trivial to create save editors.
Without obfuscation, the files are highly vulnerable to modification.
For over two decades, RPG Maker has empowered hobbyists and indie developers to craft narrative-driven role-playing games. Each major version of the engine has iterated not only on its visual capabilities and scripting language but also on its fundamental data structures. With RPG Maker MZ, introduced in late 2020, the engine adopted a new, more robust save file extension: .