4. 'Why Aren't You Doing Something Sociable?'
Anyone who still genuinely thinks this is unlikely to have been anywhere near a game or console since the early 80's. Multiplayer experiences are a key part of many games these days, ranging from friendly on an aging console to playing a co-op centred online game like Left 4 Dead or Team Fortress 2's Mann vs Machine mode. More often that not these games require good communication, strategy and teamwork to succeed, otherwise everyone involved is going to be repeating the same stage for a very long time. If masterminding an escape from a hospital full of zombies or holding off an invasion of bomb-carrying robots while making friends in the process isn't an achievement, what is?