Incredible concepts for games can be ruined without a few key details. Open-world "sandbox" games can leave players feeling lost and unmotivated, meandering through locations. Epic storylines can be swept away because the player characters didn't seem to care. Hours of game prep can be lost from players not realizing how compelling that direction could be. Grand finales can feel like math class. With just a few key details these problems vanish, and games can go as smoothly as we imagine they will when we're preparing for the big night.