Control has a number of hidden side missions and quests that offer some great rewards. This Control Side Mission Quest Guide will tell you where to find all of the Side Missions we’ve discovered on our play through including locations and details on the rewards available.
Side Missions are optional objectives that you can complete. They are often hidden throughout the game, requiring you to discover a certain location or speak with a certain person to unlock. They often reward you with special items and progress once complete, so they are worth the time. Most of the rewards are random materials and weapon/personal mods.