Marathon 2 Aleph One file
File type: Game file
A .tuneao file is a resource data file used by the Marathon 2 Aleph One game engine.
File type category:
Game file
Date updated: October 2, 2026
The .tuneao file extension is associated with Marathon 2 Aleph One, an engine for running Marathon-based games.
Aleph One powers dozens of community-made games, including projects with new levels and total conversions. The file forms part of the resources loaded by the engine for a particular game or scenario.
Open a .tuneao file through the Windows version of Aleph One. These files are normally read automatically when they are placed with the other data files required by the relevant game or scenario.
It is not normally opened as a standalone file, and a text editor or media player will not interpret its game data correctly.
A .tuneao file is a game resource file and does not have a practical general-purpose conversion format. Use it with the Aleph One game or scenario for which it was supplied.
If the goal is to modify the game, use the appropriate Aleph One scenario or resource tools rather than converting the file to another document or media format.
Software applications that handle other tasks involving tuneao files:
Microsoft Windows
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