Is this just a rip of Dectorio you plan on modifying?

Also, you can't relicense someone else's work.

Also, you can't relicense someone else's work.

https://github.com/jpanther/dectorio/blob/develop/LICENSE

Um, this mod use the same license, isn't?
And I don't see stated changes.

The original uses GPL3, this is saying MIT, which would be relicensing because GPL3 guarantees more protections than MIT does. The original author could relicense to MIT, and then this could, but since they didnt, this would need to be under GPL3 as well.

this is saying MIT

Are you talking about this? It doesn't describe what and where it licenses, etc, it doesn't even have copyright. It's misleading, legally, no one cares.
Download the mod, open dectorio_off_0.12.5.zip/dectorio_off/LICENSE and you'll see it's a copy from the original mod.

GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007

Okay so its just a visual error, but one that should be updated anyway, just to prevent confusion of exactly the kind I experienced :)