Report: 1G1R Redump Sony PlayStation Collection This report details the creation and status of a 1G1R (One Game, One ROM) collection for the Sony PlayStation (PS1), specifically utilizing Redump verified disc images. 1. Overview of 1G1R and Redump
1G1R (One Game, One ROM): A curation method that selects only one version of each game title, eliminating redundant regional variants (e.g., keeping the USA version and discarding Europe or Japan clones) to save space .
Redump: A disc preservation group that provides highly accurate, bit-perfect copies of optical media . Unlike No-Intro (which focuses on cartridges), Redump is the standard for disc-based consoles like the PS1 . 2. Collection Scope & Storage
A complete Redump PS1 set is massive, requiring significant storage. Moving to a 1G1R set dramatically reduces this footprint:
Full Redump Set: Approximately 2.44 TB (compressed in .7z) or over 3 TB uncompressed . It contains over 10,000 files including all regional duplicates and revisions .
1G1R Curated Set: Approximately 1 TB . A typical curated set contains roughly 4,500 to 4,600 unique titles after filtering for a primary region (e.g., USA) . 3. Key Creation Tools
To generate a 1G1R set from a raw Redump collection, specific software is used to process "DAT" files (database files containing file metadata): Incoming Redump Hearto's 1G1R PS1 collection : r/Roms
The Ultimate Guide to 1G1R Redump Sets for Sony PlayStation (PS1)
For fans of retro gaming and digital preservation, the Sony PlayStation (PS1) represents a golden era of gaming history. However, with over 4,000 unique titles released globally, managing a complete library can quickly become a storage and organizational nightmare. This is where the 1G1R (1 Game, 1 ROM) philosophy, combined with Redump standards, becomes the gold standard for collectors.
In this guide, we’ll explore how to curate the perfect PlayStation library that prioritizes quality, space efficiency, and historical accuracy. What is Redump? 1g1r redump sony playstation
Before diving into 1G1R, it’s essential to understand Redump.org. Redump is a disc preservation project dedicated to creating precise, "pixel-perfect" digital copies of optical media.
Unlike older "rips" that might have removed background music or compressed videos to save space in the 90s, a Redump-verified image is a checksum-validated, byte-for-byte copy of the original retail disc. When you see "Redump" attached to a PlayStation file, you know you are getting the most authentic experience possible. Understanding the 1G1R Concept 1G1R stands for 1 Game, 1 ROM.
The PlayStation library is filled with duplicates. A single game like Resident Evil might have a North American (USA) version, a European (PAL) version, a Japanese (NTSC-J) version, and several "Greatest Hits" or "Platinum" re-releases.
If you simply download a full "Redump Set," you will end up with five or six copies of the same game. A 1G1R set uses a parent-clone filtering system to ensure you only have one version of each game—usually the most complete version or the one specific to your preferred region. Benefits of a 1G1R Set:
Storage Savings: You can reduce the size of a full PS1 collection by up to 60% by removing redundant regional clones.
Cleaner Navigation: Your emulator (like DuckStation or RetroArch) won’t be cluttered with five versions of Crash Bandicoot.
The "Best" Version: 1G1R scripts typically prioritize versions with the most bug fixes (e.g., v1.1 over v1.0). How to Create a 1G1R Redump PS1 Set
Building this set manually is nearly impossible. Instead, enthusiasts use DAT files and ROM managers. 1. Obtain the Redump DAT Files
Visit the Redump website and download the latest PlayStation "Datfile." This file acts as a blueprint, telling your software which files are verified and how they relate to one another (which is the "Parent" and which are "Clones"). 2. Use a ROM Manager Report: 1G1R Redump Sony PlayStation Collection This report
Tools like Retool, clrmamepro, or RomCenter are the industry standards.
Retool is highly recommended for 1G1R because it specializes in "Parent-Clone" filtering.
You can set your Region Priority (e.g., 1. USA, 2. Europe, 3. Japan). If a game was only released in Japan, the tool will keep the Japanese version. If it was released in both the USA and Europe, it will keep only the USA version. 3. File Formats: BIN/CUE vs. CHD
A standard Redump PS1 game comes in .BIN/.CUE format. While accurate, these are uncompressed and take up significant space.To optimize your 1G1R set further, convert your final selection to CHD (Compressed Hunks of Data). CHD is a lossless format that can shrink your library size by an additional 30-50% without losing any Redump-level accuracy. Why the PlayStation 1 specifically?
The PS1 is the most popular candidate for 1G1R for a few reasons:
Regional Differences: Many PAL (European) versions of PS1 games ran 17% slower than NTSC (USA/Japan) versions. A 1G1R set allows you to automatically filter out those inferior PAL versions unless they contain exclusive content (like extra languages).
Massive Library: With thousands of games, the PS1 is where "choice paralysis" starts to hit. A curated 1G1R set makes the library approachable. Conclusion
Building a 1G1R Redump Sony PlayStation set is the final evolution of a retro gaming collection. It combines the scientific precision of Redump with the organizational sanity of 1G1R. Whether you are playing on an original console with an Optical Drive Emulator (ODE) like the XStation, or using a high-end PC emulator, a curated 1G1R set ensures you spend less time scrolling through menus and more time playing the classics.
You need the official Redump dat file for Sony PlayStation - CD. These are XML files that list every known verified dump, including MD5/SHA-1 hashes. You can find these via the Redump forum or the official DAT-o-MATIC. Step 1: Obtain the Redump DAT files You
In the world of video game preservation, few terms carry as much weight or confusion as "Redump" and "1G1R." When applied to the Sony PlayStation—one of the most iconic and pirated consoles in history—these concepts transform a messy pile of files into a pristine library of gaming history.
For enthusiasts looking to curate a perfect collection, understanding the 1G1R Redump standard is essential. It represents the difference between hoarding data and preserving art.
Build a 1G1R set if:
Keep the full Redump set if:
For 99% of Sony PlayStation fans, the 1G1R approach is perfection. It respects the work Redump does to preserve revisions while acknowledging that playing the game is the final goal. You get one clean CHD file per game title, curated by region and revision, ready to load into DuckStation or RetroArch.
The Golden Rule: Document your choices. If you choose the USA version of Metal Gear Solid over the Japanese "Integral" version (which has first-person mode), write a readme file. The next archivist will thank you.
Now go rebuild your set, and enjoy the PlayStation library the way it was meant to be enjoyed: completely, without clutter.
1g1r (“one game, one redump”) is a convention used by some preservation communities to indicate a single, verified redump of a disc image for a particular Sony PlayStation release. “Redump” refers to creating a bit-for-bit archival copy of optical media (in this case, PlayStation CD-ROMs) intended for preservation and verification against known-good dumps.