The first level begins with Sam having just landed on a foreign beach in the middle of a rainy night. Ahead lies a fortress where scientist Morgenholt is being held captive. Sam's primary goal is to rescue Morgenholt and prevent any information from reaching enemy hands. For Chaos Theory, Sam has primary, secondary, and tertiary goals. Should Sam fail to save Morgenholt, a new primary goal will initiate -- prevent the terrorists from escaping with Morgenholt's information. Often secondary goals not completed in one mission become primary goals the next. As for tertiary goals, completing them is optional, but will improve your mission rating.
Goal tiers are significant, because it's the basis for Splinter Cell's new direction. Chaos Theory is attempting to do away with the trial and error aspects of the first two games and thus remove the majority of frustrations gamers have felt over the past few years. While Sam Fisher's tertiary goal may be to avoid killing civilians, failing that goal will not automatically end a mission. In fact, only Sam's death or utter failure of all goals will result in the ending of a mission. However, killing a civilian instantly drops your rating for that level to 0. You can still complete your mission, but having killed a civilian, you receive no kudos.