With the release of RPG Maker MV and MZ, the engine shifted from RGSS to Javascript and JSON. The encryption changed, and new tools became necessary. However, the "Golden Era" of XP, VX, and Ace remains highly active. There are thousands of games on platforms like itch.io and Steam still running on these older engines.
Falo’s tool remains the gold standard for interacting with these archives. If you are a streamer wanting to extract a game's soundtrack, or a developer wanting to recover a lost project file, the Decrypter is still the first download link you click.
To understand what falo’s decrypter does, one must first understand the target: the RGSS (Ruby Game Scripting System) Encrypted Archive.
By default, when a developer in RPG Maker XP, VX, or VX Ace selects "Compress Game Data" and checks the box "Create Encrypted Archive," the engine performs a relatively simple XOR-based encryption on all game assets. This produces a file commonly named Game.rgssad (for VX/VX Ace) or Game.rgss2a (for XP). This archive contains: rpg maker xp vx vx ace decrypter by falo
The purpose of this encryption was never military-grade security. Rather, it was a polite “keep out” sign—intended to prevent the average user from casually ripping assets or peeking at scripts. Unfortunately for developers, it only took the community a few years to reverse-engineer the encryption header and key.
As of 2025, RPG Maker has moved to MV (JavaScript) and MZ (also JavaScript), which use completely different encryption (HTML5 + optional third-party packers). Falo’s decrypter does not work on those engines. However, the XP/VX/VX Ace community remains active. Thousands of games were built on these older runtimes, and tools like this ensure they are not lost to time.
Falo disappeared from public forums around 2016. No updates, no farewell. But the decrypter lives on, hosted on archive.org and various GitHub repositories. It stands as a monument to a specific era of indie game development—when a simple XOR cipher was considered “secure enough,” and when the community’s desire to tinker always overcame the developer’s desire to lock things down. With the release of RPG Maker MV and
In the United States, decryption of a commercially sold game to bypass protection may violate the DMCA’s anti-circumvention provisions (Section 1201). However, for freeware games or your own work, enforcement is virtually nonexistent. Falo themselves added a disclaimer: “For educational and backup purposes only. Do not decrypt games without the author’s explicit permission.”
Because the decrypter works so flawlessly, it enables:
Case Example: In 2013, the game Ib (created in RPG Maker 2000) saw massive asset theft due to similar tools. While Falo's tool doesn't target RM2K, it set a precedent. For VX Ace games, commercial titles like Skyborn and Deadly Sin 2 have reported asset rips traced back to Falo's utility. The purpose of this encryption was never military-grade
When you "encrypt" a game in RPG Maker XP, VX, or VX Ace, the software takes all your assets—graphics (PNG), audio (OGG/MIDI), and data (RxData)—and packages them into a few specific files:
The "RGSS" stands for Ruby Game Scripting System. The a at the end signifies an archive. The decryption key is hardcoded into the engine itself, making it effectively a "locked box" rather than a cryptographic fortress.
