> After everyone left for the weekend, Dave sat down at his computer and pulled up Diablo’s code. He scanned through and hit on something. The game was written so every action—movement, combat, quaffing a healing potion — took up a certain amount of time. Monsters moved immediately after the player initiated a command. Once the time to perform an action expired, the game turned back the clock and the player-monster turn cycle began anew. All he needed to do was whittle the time between actions down to nothing.