Insightful error message from Unreal Tournament 10 October 2004
keywords: blog, fun, design, Unreal Tournament, simulation, discrete time, tick, actors
Recently when playing unreal tournament, I got this insightful error message:

Look at those nice, meaningful names in the error message. It looks like they model the state of a game (the "world") over a number of discrete timepoints where each "actor" in the game computes its state. Input received at time t might well be used to determine the known state of actors at time t+1. Hmmm.