Although each game attempted to rejuvenate the formula when it came to boss battles, none of the entries in the series really ever managed to deliver a truly amazing final showdown. Hell, Mass Effect 3 even removed the idea of a final boss altogether, citing the feature as too gamey and inadvertently birthing the now iconic Marauder Shields meme. And it's a shame, because a franchise like this has the potential to create some truly spectacular boss battles - and honestly, with the repetitious nature of most of the combat, the series could really do with the shot of variety and adrenaline-pumping action that great boss fights provide. Look, over the years the series has given players some of the greatest bad guys in video game history; from Saren to Sovereign to the Illusive Man, the franchise isnt lacking in well-written and terrifying villains but it's imperative that this new game gives us a worthy showdown with these characters if it doesnt want to deliver another deflating and disappointing anti-climax.