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I've heard that some games are forced to use this type of cover system because they don't want to give up a button that's just devoted to getting in and out of cover. I've never thought of it that way before, but it makes sense.
It makes sense until you realize that there are countless games that use one of the 15 available buttons for cover
not to mention there have been a few games that do not have a dedicated cover button but handle cover a lot better than ME:A or GR:W
I mean, L3 is used to show your quest info...seems like they could have made a crouch/cover button there
Cover systems are dumb. No games should have it. Play Minecraft if you don't want to fight, noobs.
I don't tell you how to play your games