Outpost Infinity Siege Save Editor <INSTANT »>

Even with the best Outpost Infinity Siege Save Editor, you might hit snags.

Error: "Checksum Mismatch"

Error: "Inventory Ghosting" (Items are there, but invisible)

Error: "The save belongs to another user"

Is the Outpost Infinity Siege Save Editor worth it? Yes—if you have already beaten the campaign once.

Treat the editor as a "New Game+" feature. Use it to recover from glitches or to screw around with overpowered physics. But if you use it to skip the learning curve on Day 1, you are robbing yourself of the tension that makes the extraction phase so thrilling.

Have you used a save editor to fix a broken run, or do you consider it cheating? Let us know in the comments.

Disclaimer: This content is for informational purposes only. Always respect the game’s Terms of Service and avoid modifying files in competitive or ranked co-op modes.

While there isn't a single, officially branded " Outpost Infinity Siege Save Editor

" software, you can achieve save editing through manual hex editing or by using third-party trainers that modify live game data and save states.  Manual Save File Editing 

If you want to modify your existing save file (typically named GameSaveData.sav), you must account for the game's internal MD5 checksum verification. If the checksum doesn't match after you've made changes, the save will be rejected as corrupt. 

Save Location: Your save files are generally located in %LOCALAPPDATA%\U01\Saved\SaveGames\[SteamID]\[ProfileID]. Verification Steps: Use a hex editor like the HxD Hex Editor.

Open GameSaveData.sav and navigate to offset 25 (hex) (value should be 0E).

Select everything from this offset to the end of the file and compute a new MD5 hash.

The new MD5 hash must be written in lowercase at offset 4 to overwrite the old checksum.

Common Edits: Users often use this method to transfer save files between different Steam accounts by replacing the Steam ID and Profile ID text found near the end of the file.  Trainer-Based Save Modification 

For most players, using a real-time trainer is a more accessible way to "edit" their save. These tools allow you to change quantities (like materials or money) while the game is running, which are then naturally written to your save file when the game autosaves. 

WeMod Trainer: Includes options to Edit Materials, Edit Power, and provide Infinite Money & Tech Points. Outpost Infinity Siege Save Editor

Nexus Mods (GM Trainer): Provides a "Game Master" debug interface (typically activated with F1) that allows for direct in-game modifications.

Cheat Engine: Can be used to find and lock addresses for currency and research items, though some values (like research points) must be collected during a mission to be effectively modified.  Save Scumming and Backups 

Because the game has strict "Iron Man" mechanics where deaths can be punishing, many players use manual backup techniques rather than direct file editing.  Outpost: Infinity Siege - PCGamingWiki PCGW

While there is no single "one-click" software officially titled Outpost Infinity Siege Save Editor, players can achieve the same results using hex editors, trainers, or manual file manipulation. Modifying your save data allows you to bypass the grind for materials, adjust outpost core stats, and even reroll recruitment RNG. Essential Save File Preparation

Before attempting any edits, locate and back up your save data to prevent permanent corruption.

Save File Location: Navigate to %LOCALAPPDATA%\U01\Saved\SaveGames\[Your SteamID]\[Profile ID].

Primary Save File: The main file is typically named GameSaveData.sav.

Backup Method: Simply copy the entire Saved folder to a secure location on your desktop. The game also maintains its own backups in local/U01/saved/savebackup/. Manual Editing via Hex Editor

Advanced users can use a hex editor like HxD to modify specific parameters within the .sav file. Note that the game utilizes an MD5 checksum at the beginning of the file to verify integrity. Open the File: Load GameSaveData.sav in your hex editor.

Calculate MD5 Selection: The game calculates the checksum from offset 25 (hex) to the end of the file.

Update Checksum: After making any changes, you must recalculate the MD5 for that selection and replace the 32-character string at offset 4.

Character Sensitivity: Ensure the new MD5 hash is written in lowercase; the game may reject uppercase strings. Recommended Tools for Modification

If manual hex editing is too complex, several third-party tools provide a more user-friendly interface for "editing" your game state in real-time.

WeMod: Provides a comprehensive trainer that allows you to edit materials, power, and tech points directly without touching the save file code.

Cheat Happens: Offers a premium trainer with over 150 cheat options, including unlimited health and ammo.

Nexus Mods (GM Trainer): A Lua-based mod that adds convenient keybindings for activating debug features and cheats already present in the game engine.

FearLess Cheat Engine: Popular tables for Cheat Engine that allow editing of skill points, EXP, and outpost coordinates. Gacha RNG Manipulation (Recruitment) Even with the best Outpost Infinity Siege Save

You can "edit" your recruitment outcomes without third-party software by using the backup system:

For players dealing with missing saves or wanting to transfer data between Steam accounts, manual editing via a hex editor like HxD is the most reliable (though technical) option.

Process: You must locate your GameSaveData.sav in %AppData%\Local\U01\Saved\SaveGames\[SteamID]\[ProfileID].

Key Challenge: The game uses an MD5 checksum validation. If you modify any value (like currency or materials), you must recalculate the MD5 from offset 25 (hex) to the end of the file and replace the original hash at offset 4.

Verdict: High effort, but the only way to "hard" edit certain account-locked variables without a dedicated UI tool. Trainer-Based "Live" Editing

Most players opting for a "save editor" experience actually use real-time trainers like those from WeMod, which function similarly to a save editor by modifying values while the game is running. Key Features:

Resource Management: Instant editing of Materials, Power, and Core Outpost output.

Progression: Infinite Money and Tech Points, plus the ability to ignore crafting requirements.

Research: Boosting research speeds without requiring Efficiency Points.

Pros: User-friendly interface; no need to manually calculate MD5 hashes.

Cons: Requires the game to be running; some features may break after game patches. Backup Management & "Gacha" Rerolling

A popular "manual editor" technique involves managing the game's robust backup system to manipulate RNG.

The "Pre-Backup" Strategy: Players manually copy their SaveGames folder before recruiting operators at the barracks. If the stats are poor, they "roll back" the save to try again.

Automatic Backups: The game creates a high volume of backup files in the savebackup folder, which can be renamed to GameSaveData.sav to recover lost progress. Summary Review Table Manual Hex Editing WeMod Trainer Save Backup Swapping Ease of Use Low (Technical) High Account Transfer Yes Edit Materials/Money Yes (Instant) No (RNG reroll only) Risk of Corruption

Pro-tip: Always back up your entire SaveGames folder before attempting any editing, as an incorrect MD5 hash will cause the game to reject the save entirely.

missing save file :: Outpost: Infinity Siege General Discussions

While there is no single "all-in-one" save editor for Outpost: Infinity Siege Error: "Inventory Ghosting" (Items are there, but invisible)

, players use a combination of hex editors, Cheat Engine tables, and manual file manipulation to modify their progress. Save File Location

Before attempting any edits, locate your save files to create a mandatory backup. The game typically stores data in the following directory:%LOCALAPPDATA%\U01\Saved\SaveGames\[SteamID]\. Manual Save Editing

Advanced users can modify save data using a Hex Editor (such as Hexed.it). This is often used for:

Transferring Saves: You can move a save from one Steam account to another by replacing the PlayerId (Steam ID) and updating the MD5 checksum stored at offset 4 of the .sav file.

Fixing Corruption: Some players use hex editing to recover lost progress by swapping sections of a corrupted save with a fresh one.

MD5 Validation: The game validates saves using an MD5 hash. If you edit the file manually, you must recalculate the MD5 from offset 25 to the end of the file and write it back in lowercase at offset 4, or the game will reject the file. Cheat Engine and Trainers

For most players, using Cheat Engine or specialized trainers is more efficient than direct file editing.

Cheat Tables: Tables found on community forums like FearLess Cheat Engine allow for real-time modification of turret ammo, core boost caps, and resource counts.

GM Trainer: A popular "GM Trainer" mod on Nexus Mods grants access to developer-like abilities to change gameplay parameters without deep file knowledge. Modding Support Outpost: Infinity Siege - PCGamingWiki PCGW

Do you want to see if a fully upgraded Gauss Turret can hold the North Gate against a Wave 20 boss? With a save editor, you can give yourself the research points instantly to test builds without waiting 10 hours for research timers.

Because Outpost runs on Unreal Engine 5, advanced users can use tools like FModel or UAssetGUI to manually unpack the game's .pak files or edit raw save data located in: %LocalAppData%\Outpost\Saved\SaveGames\

Warning: This requires hexadecimal editing and knowledge of UE5's data tables. One wrong byte can corrupt your 50-hour outpost.

Let’s walk through a practical example: You want to add 50,000 Nanites and unlock the "Helix Cannon" blueprint.

Step 1: Backup Everything Navigate to your SaveGames folder. Right-click the folder and select "Copy." Paste it to your desktop as "OIS_Backup." Never skip this step.

Step 2: Launch the Editor Open your downloaded Outpost Infinity Siege Save Editor. Most GUI tools will auto-detect your save directory. If not, manually point it to the .sav file of your most recent manual save (avoid "Quicksave" files as they are often fragmented).

Step 3: Editing Resources Locate the "Inventory" or "Resources" tab.

Step 4: Unlocking Items Go to the "Research" or "Blueprints" tab. You will see a list of all turrets, traps, and weapons. Click "Unlock All" or selectively check the items you haven't earned yet. Note: Unlocking story-locked items before completing the tutorial can break quest triggers. Only edit gear after Act 2.

Step 5: Saving & Injecting Click "Save File" or "Export." The editor will overwrite the .sav file. If the editor creates a new file (e.g., SaveGame_Edited.sav), rename it to match the original filename exactly, deleting the old one.

Step 6: Verify Launch Outpost: Infinity Siege. Load your save. You should see your new resources. If the game crashes on load, you forgot Step 1. Restore your backup and try a different editor.