6) You must keep your head
If any of the Smiths get blown up by a Heaven’s Smile, their heads are left behind in a paper bag. Garcian has the ability to collect the noggins, carry them in his briefcase and resurrect characters at the nearest save point. Lose Garcian and it’s game over. Then there’s Susie Sumner, a disembodied cranium that regularly turns up in drawers and cupboards to hand out power-ups, in the shape of rings pulled from her mouth.