8. Insane secondary fire options
Okay, so real, modern-day military rifles do sometimes come with attached grenade launchers or under-slung shotguns, but games are outright obsessed when it comes to fitting out already fantastic guns with ludicrously powerful, totally incongruous and gloriously unnecessary secondary attachments.
We have exploding electro-spear guns. We have assault rifles that fire every bullet in the clip at once if you flick the right switch. We have guns that double up as grenades. But surely all of this stuff, however extravagant, owes a debt to the moment in Aliens when Ripley proved that DIY and killing do mix, as she taped together a pulse rifle and a flamethrower to create a bullet-spewing, barbequing, grenade-lobbing weapon of monster destruction.