Thanks for the help,

As much as I'd love to do a fan project like sin maybe the safest and best bet is with an original idea in the same spirit.
Also probably look better in my portfolio.
Lecturers believe both are creative in different ways so grading won't be effected.
Ritual Entertainment (the guys that did sin) were brought out by the company that makes casual games like luxor. I'm not too sure if they would have a problem with a fan non commercial project but I definitely know they're not working on a new sin game.

Safest and best bet is original idea

Thanks for your help guys!

Matt