Sketchnote – game architecture
Destiny has some pretty interesting loops and arcs. Once you beat the story, the post game content (which makes up most of the game) doesn’t contain any more “new” content. Every “new” mission is just one of the old story missions with higher level enemies. They also reskin some of the missions to give it a new feel, but the base mechanics of each level don’t change no matter how many times you replay each mission.