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I Shot You First: Networking the Gameplay of Halo: Reach

GDC Festival of Gaming · talk · Watch on YouTube

Game programming & enginesDistributed systems

What it is

Bungie's David Aldridge explains the networking programming behind Halo: Reach in a 2011 GDC session. It covers how gameplay stays in sync online, including forecasting and state reconciliation.

Why Hacker News recommends it

HN considers it one of the best game networking talks, with insights that carry over to distributed systems generally.

  • 4 people recommended it
  • 4 different months
  • 3 strong recommendations
  • first 2022, last 2025

What HN commenters said

  1. “This talk from the Halo: Reach team might be one of my favorite game networking talks I've ever seen”

    Halo: Reach team talk on game networking

    Jasper_, 2022-04 · Strong recommendation · in “MCC (Master Chief Collection) Server Incident Summary”

  2. “I cannot recommend watching GDC's content enough”

    Entertaining deep dive into technically complicated game networking

    c4wrd, 2025-03 · Strong recommendation · in “Activision Cut Call of Duty's Build Time by 50%”

  3. “One of my all time favourite bits about distributed systems comes from the (legendary) talk at GDC”

    Sequence diagrams with tilted arrows to find lag

    stefan_bobev, 2025-10 · Strong recommendation · in “Summary of the Amazon DynamoDB Service Disruption in US-East-1 Region”

  4. “A great talk about this is about halo reach'es networking”

    Forecasting and state reconciliation in Halo Reach networking

    SahAssar, 2022-05 · Recommendation · in “How do video games stay in sync?”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: halo reach, netcode, state synchronization, gdc, distributed systems

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