The achievement "Z-Genocider 2: Genocide Harder" is a reference to an achievement from the first Dead Rising, "Zombie Genocider". The first game's achievement was awarded for killing 53,594 zombies, which was the population of the fictional town the game took place in. Valve later made an achievement for Left 4 Dead which required killing 53,595 Infected, exactly one extra zombie. Capcom continued this long-running gag by requiring you to kill 53,596 zombies for the "Z-Genocider 2: Genocide Harder" achievement.