Interactive Dialogue System in Video Games

The dialogue system in games like Left for Dead is fully responsive to gameplay, can be interrupted at any moment, and is contextual. The system is designed to care about specific facts of the game world for each line of dialogue, allowing for general or specific lines to be delivered in different situations. This system enables great storytelling and allows for modification of individual lines, providing an extra layer of storytelling. The absence of voice-over in indie games allows for additional modification of the text itself, adding another layer to the interactive dialogue system.