GvasViewer

GvasViewer
GvasViewer
General
Author	turtle-insect
Type	Hack Utilities
Version	0.38
License	GPL-3.0
Last Updated	2026/05/31
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_9_win64.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_9_win64.dll

Download EpicInstaller from the Epic Games Store.
Install the Epic Games Launcher.
Install Unreal Engine 5.7.4.
Search for oo2core_9_win64.dll in the Unreal Engine installation folder.
Copy oo2core_9_win64.dll to the same folder as the executable file.

Screenshots

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/