3DO file - How do I open a .3do file?
The table below provides useful information about the .3do file extension. It answers questions such as:
- What is the .3do file?
- What program do I need to open a .3do file?
- How can the .3do file be opened, edited or printed?
- How can I convert .3do files to another format?
Table of Contents
- ✅ Total Annihilation 3D Object
- ✅ FreeDO Phoenix ISO Image
- 🔄 .3do file converters
- 🚫 .3do file related errors
We hope you find this page helpful and a valuable resource!
2 extension(s) and 0 alias(es) found in database
✅ Total Annihilation 3D Object

The 3DO file is a Total Annihilation 3D Object. Total Annihilation is a real-time strategy video game created by Cavedog Entertainment.
✅ FreeDO Phoenix ISO Image

The 3DO file is a FreeDO Phoenix ISO Image. FreeDO is a Panasonic 3DO emulator.
Other types of files may also use the .3do file extension.
🚫 The .3do file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
Is it possible that the filename extension is misspelled?
We found the following similar file extensions in our database:
🔴 Can't open a .3do file?
When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:
Windows cannot open this file:
example.3do
To open this file, Windows needs to know what program you want to use to open it...
If you don't know how to set the .3do file association, check the FAQ.
🔴 Can I change the extension of files?
Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.
If you have helpful information about the .3do file extension, write to us!