"I filed an FTC complaint against EA. After reading through the list of promises about the ending of the game they made in their advertising campaign and PR interviews, it was clear that the product we got did not live up to any of those claims," writes Mass Effect 3 player El Spiko on the BioWare Social Network.
"This is not something I was happy to do, but after the terrible ending that was in no way the product that had been advertised to me and the lack of any kind of response from BioWare/EA to address this, I felt it was one of my only recourses. I'll be returning my copy of the game before the end of my 30-day return policy if the ending still hasn't been addressed by then," adds the user.
A number of other users are planning to make similar complaints with the FTC, as well as with the Better Business Bureau.
The game's director Casey Hudson has since defended the game's ending, claiming that the polarising conclusion makes it more memorable.