GvasViewer

GvasViewer
GvasViewer
General
Author	turtle-insect
Type	Hack Utilities
Version	0.39
License	GPL-3.0
Last Updated	2026/06/26
Links
	Download
	Website
	Source
	Support Author

GvasViewer is a tool that lets you view GVAS files, which are a specific type of save data file used by games made with Unreal Engine (e.g. Romancing Saga 2).

User guide

Requirements:

Windows 10 or 11
.NET 10
※ oo2core.dll

How to Use:

Go to File > Open to load your GVAS file.
Use the tree view to browse through the file.

ArrayProperty's import

You must have at least one property.
Character encoding is UTF-8.
If the first character is a #, skip insertion.
Skip insertion for empty lines.

# skip sample

# insert sample
abc

MapProperty's import

You must have at least one property.
Character encoding is UTF-8.
If the first character is a #, skip insertion.
Skip insertion for empty lines.
Treat tabs as delimiters.
Skip insertion when the split by the delimiter does not result in exactly two elements.

# skip sample
abc
abc def ghi

# insert sample
abc def

oo2core.dll

Download EpicInstaller from the Epic Games Store
Install the Epic Games Launcher
Install Unreal Engine 5.8.0
Search for oo2core.dll in the Unreal Engine installation folder
Copy oo2core.dll to the same folder as the executable file

Screenshots

Error creating thumbnail: Unable to save thumbnail to destination

External links

Author's website - http://turtleinsect.php.xdomain.jp/
GitHub - https://github.com/turtle-insect/GvasViewer
GBAtemp - https://gbatemp.net/threads/unreal-engine-gvass-viewer.662858/