As chained missions go, they are not what i think they should be, one destination should lead to the next and the next - for a total of 5 - using the various types of missions already included in the game - example, a planetary base scan gives you part 2 of the mission, which then leads to part 3 and so forth - with an extra bonus when all parts are completed in a time specified - if late, you get rewarded only the 5 parts listed in the original mission