Skip to content

Multiplayer & netcode

Make online play feel instant: fixed ticks, prediction for your own character, interpolation for everyone else and rollback.

Start: Delta Time
0/10
x
  1. 1. Delta Time

    See why raw frame time cannot drive a shared simulation.

    coreGame Feel
  2. 2. Fixed Timestep

    Every input must mean the same simulated time on every machine.

    coreSystems
  3. 3. Latency, RTT and Jitter

    Measure the delay, jitter and loss you are designing around.

    coreNetworking
  4. 4. Client-Side Prediction

    Your own character responds at once, and the server stays in charge.

    commonNetworking
  5. 5. Snapshot Interpolation

    Other players move smoothly from a few updates a second.

    commonNetworking
  6. 6. Dead Reckoning and Extrapolation

    Guess between updates and send only when the guess goes wrong.

    commonNetworking
  7. 7. Lag Compensation

    Let shots hit what the shooter actually saw.

    advancedNetworking
  8. 8. Deterministic Lockstep

    Send only inputs and wait for everyone, the classic RTS model.

    advancedNetworking
  9. 9. Rollback Netcode

    Rewind and re-simulate when precise timing rules out input lag.

    advancedNetworking
  10. 10. Interest Management (Area of Interest)

    Send each player only what is near them, so servers scale.

    commonNetworking