Strategy games have a tendency to straddle an area between slow, decisive moves and the chaos of action happening seemingly out of your hands and all around you. Some strategy games are slower-paced than others. As tense as things can get in XCOM: Enemy Unknown, it’s more or less leaned towards the ease of turn-based decisions than the rush of other games of its kind. So Firaxis did something different this time. They came up with XCOM: Enemy Within and managed to amp up the action with one simple change: you don’t have to kill all the enemies within.