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Techniques & Technology

Dialogue Trees

Branching conversation

Dialogue trees structure interactive conversations as branching paths, letting players shape character relationships and story outcomes through accumulated choices.

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Overview

Words as weapons. Dialogue trees transformed conversation from flavour text into gameplay system. Early adventure games offered simple choices; RPGs like Fallout added skill checks; Mass Effect introduced the conversation wheel; Disco Elysium made dialogue the entire game. The technique lets players craft character personality through accumulated choices while writers manage exponentially branching complexity.

Fast facts

  • Origins: Text adventures, early RPGs.
  • Innovation: Skill-gated options.
  • Challenge: Combinatorial explosion.
  • Modern form: Conversation wheels, keywords.

Structure types

TypeCharacteristics
Hub and spokeReturn to central options
WaterfallLinear with branches
NetworkInterconnected nodes
HybridCombined approaches

Player expression

MethodGame example
Tone selectionMass Effect wheel
Skill checksFallout series
Keyword responseMorrowind topics
Full sentencesDragon Age

Skill integration

Check typeFunction
Speech/persuasionConvince NPCs
IntelligenceUnlock options
BackgroundContext-specific
ReputationRelationship gates

Design challenges

ProblemSolution
Combinatorial explosionHub structure
Voice acting costLimit branches
Player expectationClear consequences
Testing complexityAutomated tools

Evolution

EraInnovation
Text adventureBasic branching
CRPG golden ageSkill integration
Voice acting eraConversation wheels
ModernSystemic reputation

See also