They add depth. Knowing the survivors' back stories makes you care more about them. You feel more involved in the game as you're not just playing random characters but ones with a past.
The back stories enhance gameplay in multiple ways. First, it gives a reason for the survivors' actions. For instance, Coach's background as a coach might make him more protective. Second, it creates a more immersive world. As you play through different levels, you can imagine how the survivors' pasts influence their reactions to the infected and the environment. Also, it helps in building a connection between the players and the characters, making the overall gaming experience more engaging and meaningful.
The back stories play a crucial role in enhancing gameplay. When you know that Ellis has his own set of experiences from his small - town life, it makes his character more relatable. This connection makes you more invested in the game. The different personalities of the survivors, based on their back stories, also affect how they interact during gameplay. For example, their communication during intense situations can be influenced by their pasts. Moreover, the back stories set the mood for the entire game. The post - apocalyptic world they are in is more understandable when you consider their individual stories, and this all - around enriches the gameplay experience.