The AI Systems of Left 4 Dead - Valve

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Goal: Generate dramatic game pacing ‣ Adaptive Dramatic Pacing reacts to Survivor team • Generates reliable peaks of intensity without completely overwhelming the team • Because of player variation and procedural threat population, timing and location of peaks will differ each time the game is played ‣ Algorithm adjusts pacing, not difficulty • Amplitude (difficulty) is not changed, frequency (pacing) is ‣ Simple algorithms can generate compelling pacing schedules • Survivor Intensity estimation is crude, yet the resulting pacing works
‣ Just the beginning… • Expand repertoire of verbs available to the AI Director • Explore further procedural content generation opportunities • How to utilize these systems in other game projects Future Work
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The AI Systems of Left 4 Dead Micha
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Left 4 Dead: The Survivor Team
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Left 4 Dead: The Special Infected
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Left 4 Dead
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Left 4 Dead
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Goals of Left 4 Dead AI ‣ Deliver
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Goal: Deliver Robust Behavior Perfo
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Page 41 and 42: Goal: Deliver Robust Behavior Perfo
Page 47 and 48: Goal: Provide Competent Human Playe
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Page 51 and 52: Goals of Left 4 Dead AI ‣ Deliver
Page 53 and 54: Goal: Promote Replayability ‣ In
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Page 57 and 58: ‣ The Navigation Mesh • Represe
Page 61 and 62: ‣ The Active Area Set Goal: Promo
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Page 77 and 78: Goals of Left 4 Dead AI ‣ Deliver
Page 79 and 80: Goal: Generate dramatic game pacing
Page 91: Goal: Generate dramatic game pacing
Page 95: THANK YOU!
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The AI Systems of Left 4 Dead - Valve

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