To use a downloaded save file or to make your own saves portable, you first need to know where GTA Underground stores its save data. Unlike many modern games that encrypt or hide their save files, GTA Underground —being a mod built on the San Andreas engine—uses a straightforward, user-accessible folder structure.
If you use a custom ASI loader or a script plugin like No Our Documents , your save folder will be directly inside your root directory under a folder named data or userfiles . Step 4: Paste and Replace Copy your downloaded GTASAsf1.b file. Paste it into your designated user files folder.
Grand Theft Auto: Underground is one of the most ambitious total conversion mods in gaming history. By combining the maps, vehicles, weapons, and gangs of GTA San Andreas, GTA Vice City, GTA III, Manhunt, Manhunt 2, and Bully into a single massive universe, it creates the ultimate 3D-era playground.
By default, GTA San Andreas and its mods look for saves in your Windows Documents folder. However, to make it truly portable, you want the saves inside the game folder.
Download a plugin named or "No COOP Save Redirector" (often available on specialized GTA modding forums like MixMods or GTAInside).
To achieve 100% completion in this mod, you don't just spray tags and collect oysters. You must complete unique stunt jumps across four different game engines, deliver cars to garages in three separate timelines, and finish storyline missions imported from VC and LC.
Most players do not download GTA Underground for the narrative. They download it to drive a tank through the streets of Portland, fly a Sea Sparrow over Bullworth Academy, or start a gang war in Little Haiti using a jetpack.
Access unique cars and planes parked in your garages.
: All properties owned and infinite ammo/weapons available at safehouses. Save File Format : Files are usually named GTASAsfX.b (where X is the slot number, e.g., GTASAsf1.b for Slot 1). Steam Community Installation Guide for Portable Setups
First, it is crucial to understand what "100%" means in the context of GTA: Underground . Unlike the original San Andreas , which had a clear checklist (100 tags, 50 oysters, 36 import/export cars, etc.), Underground integrates mission strands from Vice City and Liberty City Stories , along with original side activities. A true 100% completion would require:
Given the mod's unstable nature, almost all "100% saves" circulating on forums (GTAForums, ModDB, Reddit's r/GTAunderground) are either:
Whether you are getting a specific upon loading
That is why the demand for a has exploded. Players want the full sandbox without the grind. This article dives deep into what this save file is, why the "portable" aspect matters, where to find a legitimate one, and how to install it without corrupting your mod.
: Prevent the mod from overwriting your vanilla GTA San Andreas saves in your standard Documents folder.
From a modding community perspective, the demand for a 100% portable save is met with a degree of weariness. Veteran modders often respond with a curt "do it yourself" or "the mod isn't finished; there is no stable 100%." This is not gatekeeping; it is a technical reality. Relying on a pre-made save for Underground can lead to a paradox: the save itself might be the reason the game crashes. For example, if the save claims "100%" but the player has not installed a required hotfix for the Vice City Malibu Club asset mission, the game will crash the moment they approach the building.
The positive feedback surrounding these save files typically focuses on accessibility and convenience Instant Map Exploration