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.
In the world of video game preservation, three acronyms carry immense weight: No-Intro, Redump, and TOSEC. For Sony PlayStation enthusiasts, however, the combination of Redump and 1G1R represents the holy grail of collection management.
If you have ever downloaded a massive "Full ROM Set" only to find 12 copies of Crash Bandicoot (USA, Europe, Japan, Demo, Revision 1.0, Revision 1.1, Platinum, etc.), you have experienced the chaos that 1G1R (One Game, One Revision) solves.
This article explores what Redump is, why the PlayStation library requires special attention, and how the 1G1R philosophy creates the perfect balance between preservation and practicality. 1g1r redump sony playstation
| Issue | Example | Redump Impact | | :--- | :--- | :--- | | LibCrypt | Spyro the Dragon (Europe) | Multiple dumps for protected vs unprotected discs. | | TOC (Table of Contents) | Castlevania: Symphony of the Night | Different TOCs for early vs late presses. | | Budget Re-releases | Gran Turismo (Platinum) | Identical data, new disc ID. | | Revision Hell | Tony Hawk’s Pro Skater 2 | v1.0 (glitchy), v1.1 (fixed), v1.2 (censored). |
Without 1G1R, your collection is bloated with silent duplicates.
Disclaimer: This information is for educational purposes. Only download ROMs for games you physically own. 1g1r (“one game, one redump”) is a convention
Should an English fan-translation of Tales of Phantasia (Japan) replace the Japanese original in your 1G1R set?
This is where the 1G1R philosophy comes in. Standing for One Game, One ROM, this is a filtering process applied to the massive Redump database. The goal is to distill the library down to a single representative copy of every unique game.
The criteria for a 1G1R set usually prioritize specific regions, typically following this hierarchy: | Issue | Example | Redump Impact |
The 1G1R (One Game, One ROM) principle was born out of frustration. Standard "full sets" (e.g., a complete TOSEC or No-Intro pack) contain every single known variant of every game. For the PlayStation, that means:
A full Redump set for Sony PlayStation is over 6,000+ disc images (including multi-disc games counted separately). A 1G1R set reduces this to roughly 1,500–2,000 unique titles. It uses a prioritization system (usually: USA > Europe > Japan) to keep only the best, most playable version of each game.
Combined: A curated set of Redump-verified PS1 disc images, with no duplicate games per title.