The popularity of zombies has lasted for decades, almost since the dawn of the modern zombie genre. There have been countless books, movies, video games, role-playing games, and graphics that use zombies as a focal point. The new works in the genre achieve greater heights of popularity all the time, and when it comes to the zombie genre, there seems to be no stopping it. Writers and directors all add their own spins to the genre to maintain its freshness, and new movies seem to keep on topping one another in their efforts to stand out from the pack. As video games become even more mainstream in the modern cultural environment, zombie games will stake out an even larger niche within the general category of video games. Playing video games at any age is much more socially acceptable than it used to be across the broader cultural landscape, and that will affect the demographics and the popular trends in gaming.
Zombies also lend themselves very well to the video game format. The nature of the zombie apocalypse is such that hordes of new targets just keep coming, almost faster than you can eliminate them. Online Zombie games that are based on shooting and eliminating the zombies one by one or in large groups take advantage of that principle and that genre convention. Zombies also have the advantage of being largely faceless masses that can be coded relatively easily, and that are easy to replicate for the sake of a video game. People who are designing zombie games may need not to invest the same amount of effort when it comes to shaping each individual zombie character, at least in comparison to the effort that they would expend with other types of characters visually.
The zombie apocalypse scenario makes for a very successfully video game formula on many different levels for a very wide demographic of people. There is a lot of tension inherent in the zombie apocalypse scenario, which translates very well to the zombie games themselves. The world hangs in the balance, and the amount of zombies that each individual person can take out by themselves can make just enough of a difference to keep going. However, the task still seems fairly hopeless, considering the number of zombies that are typically involved in a zombie apocalypse situation. Zombie games tap into those conflicting emotions, and give people the opportunity to fight zombies themselves in a safe environment.
Zombie movies have a lot of entertainment value, but watching movies is still ultimately a passive experience. Watching a zombie movie means watching other people fight zombies. Playing zombie games more directly allows you to fight them yourself, and for you to be the hero in your own story, so to speak. Both zombie movies and zombie games are appealing for very much the same reasons, but they ultimately offer different overall experiences for both the gamers and for the viewers. Some fans of the zombie genre are probably going to be gamers themselves, whereas some people who may not like zombie movies as much will still play zombie games for the video game experience that they offer. There is overlap between movie fans and video game fans, and zombie games provide a welcome intersection between the two of them.