An m3t file extension is related to the Myst 3 computer game. An m3t file contains text data.
Software that open m3t file
M3T file extension - Myst 3 Exile text file
What is m3t file? How to open m3t files?
File type specification:
The m3t file extension is associated with the video game Myst 3 Exile. Myst 3 Exile was sold as stand-alone application and now is sold as a part of Myst 10th Anniversary Collection.
The m3t file contains game texts.
The default software associated to open m3t file:
Company or developer:
Ubisoft Entertainment S.A.
Myst 3 Exile is first person adventure game released in 2001 based on Myst and Riven franchises.
Myst 10th Anniversary Collection 
Company or developer:
Ubisoft Entertainment S.A.
Myst 10th Anniversary Collection is collector's edition that contains video games Myst Masterpiece, Riven and Myst 3 distributed on DVDs. All games in this edition are re-engineered to be fully compatible with Windows XP.
List of recommended software applications associated to the .m3t file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open m3t file, edit m3t file, convert m3t file, view m3t file, play m3t file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with m3t file - Myst 3 Exile text file
Click on the software link for more information about Myst 3 Exile. Myst 3 Exile uses m3t file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
Microsoft Windows:
Main software associated with m3t file by default:
Myst 3 Exile
Myst 10th Anniversary Collection
