GvasViewer

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

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/