Bar the introductory and epilogue mission sequences, missions in "Saints Row" are divided between three linear story arcs which can be progressed through simultaneously or one by one, each with the objective of extinguishing a rival gang. Players engage in these missions at their leisure, but a prerequisite to instigate a mission is that they have filled up a bar on their Respect meter to allow them to unlock and play it. Respect is a currency earned by completing activities, which are mini-games that are scattered across the world and have increasing levels of difficulty. Missions and activities also accrue player's cash income, which can be spent on goods and services such as weapons and clothes. Should players fail a mission, they may instantly reattempt it without incurring a loss of their Respect points. Cinemas scattered throughout the game world allow players to replay missions an unlimited number of times.