Centred weapons come from a time before crosshairs and mouse-aim were common, when having a gun in the middle of the screen was how you lined up your shots. That changed in the mid-90s, when games like Star Wars: Dark Forces and Iron Angel of the Apocalypse first let us shoot guns while also looking at their sides a bit. It’s nice to go back when given the chance though, like when you’re wielding the old school Quake rocket launcher in Team Fortress 2.
Neither option’s 100% realistic, as the internet’s army of gun experts will happily explain to us, but it’s nice to have another retro option while shotgunning cacodemons.
Source: PC Gamer