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Step 1: Double-Click the File
Before you try any other ways to open 3DO files, start by double-clicking the file icon. The file should open automatically. If it doesn’t open, or you see an error message, move on to Step 2.
Step 2: Choose the Right Program
There are many different programs you can use to open 3DO files. If the file doesn’t open when you double-click it, you may not have one of these programs on your computer. Try installing the most common programs associated with 3DO files, like Total Annihilation Object File or Tank3 Demo File. If none of these programs work, move to Step 3.
Step 3: Figure Out the File Type
The file type can give you a clue as to which programs can open your 3DO file. Files with the 3DO extension are usually Uncommon Files. If you’re not sure what the file type is, follow the steps below to find it:
Using Windows:
- Right-click the file’s icon
- Click “Properties”
- Find the file type listed under “Type of File”
Using a Mac:
- Right-click the file’s icon
- Click “More Info”
- Find the file type listed under “Kind”
Once you know the file type, you can use this information do some searching for other possible programs that utilize file extension 3DO or that open Uncommon Files. If this still doesn't help, move to Step 4.
Step 4: Check with the Software Developer
The most common programs associated with 3DO files are all created by different software developers. These developers can help you if you’re having trouble opening your 3DO file. Find your program in the left column of the table below and contact the developer listed in the right column.
| Software | Developer |
|---|---|
| Total Annihilation Object File | Cavedog Entertainment |
| Tank3 Demo File | Windows Programmer |
Step 5: Download a Universal File Viewer
If you have completed Steps 1 through 4 and you still can’t open your 3DO file, it’s time to try a universal file viewer like File Magic (Download). A universal file viewer is a program you can use to open hundreds of different types of files (depending on the format). Note: If your 3DO file isn’t compatible with a universal file viewer, it will open in binary format.
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1File types that are unsupported can be opened in binary format.
