4. Trolling Potential
Depending on your preferences in games this may be a questionable one, but there's no doubt that sandbox titles have popularised the art of single-player trolling. From stopping the train in GTA V to crashing into poor merchant's ships in Assassin's Creed 4 'just because', there's an awful lot of ways you can mess with the slightly dim NPCs that populate every game. There's no doubt that Watch Dogs is going to carve its own path in the trolling hall of fame. The ability to hack provides an instant, huge amount of ways to mess with civilians; from hacking traffic lights to cause the biggest pile-up in US history - gleefully speeding away as yet another car is torn apart by the bollards you just turned on - to nicking thousands of hard-earned American dollars from a working-class civilian and spending it on grenades. There's bound to be even more ways to mess with people, but hacking provides an instant platform to utterly ruin someone's day. Feeling really bitter and down? Just sit at a traffic light and constantly flip the lights off, while watching the pedestrians' reactions (I'm not quite sure if this will improve your day, and I don't know what that says about you if it does either). And of course, there's one very interesting aspect of gameplay in Watch Dogs which will be particularly good for letting off steam...