Never got these games not a big fan of single player as I have been doing it since the early 80s just got sick of big odyssey style games too . Every now and then I find one I like ME1 was a joy. Rather some good co op or multi player unless its a racer I like to finish those.
May just be an open gl issue if it was made using direct x and will easily be patched up no need to panic am sure it will pull an extra few frames in the long run lol.
Certainly had too much to play personally have almost finished single player on Forza 6 , then I will get into Halo 5 just simply had too much on to buy it but well done those that did we are spoilt for choice atm.
Put a lot of time in on pc I will get this version on xb1 for achieves and laughs just happy a niche fun game from pc is on console , not sure how it went on 360 only played a demo.