Mass Effect 1 was released on X360 in 2007 and was published by MS. 

It looks good. I've always wanted to play it. ME2 was the first and only in the series I've tried, and I thought it was pretty sweet. So my thought is to get around to it some day. Hopefully. I hear things about elevators......

Mass Effect is as much an EA game as Banjo Tooie is a Microsoft game or Saints Row The Third is a Deep Silver game.

I liked it back then, but nowadays I don't think is a great game, it hasn't aged well for me.

Also, it barely fits into the RPG definition.

I relly never relly didnt try Mass Effect, I hope that rumoured about Mass Effect Trilogy Remaster is true so that I will give a try.

I was a RPG fan 10 years prior to that when Game of all Generations aka FF7 came out but damn the 360 was awesome when ME came out:

-Mass Effect
-Lost Odyssey
-Bioshock
-Blue Dragon
-Crackdown
-Halo 3

Exclusives you care about! Xbox hasn't been the same since.