Completing the side quests of "Final Fantasy XV" may be optional, but if you want more rewards, you might want to complete them all. Some of these may be more difficult than the others but none of them should be undoable. Here's your guide in completing "Final Fantasy XV" Chapter 1 side quests.
Final Fantasy XV Chapter 1 Tips
For "The Pauper Prince", remember that if you interact with the weapon shop man, you will be told that you are penniless. However, you can go to Cindy and ask for a loan so you can be given the quest on top of some cash. During the said quest, you can use the two-handed sword to take down enemies. For the "Hunter Becomes The Hunted" quest, you would get a Magic Flash by clearing out your enemies up to the next point. Do take note that enemies will appear by surprise as you start.
For "The Mutant Maraudar" quest, you'd need to run after a monster. You can use your flask to lower its HP to half. For "The Highway Helper", you will stumble upon a guy who's in need of a repair kit. You can get one of these from the gas station attendant. Remember that you might need more of these along the way.
More Guides On Final Fantasy XV Chapter 1
For "Gone Hunting", 500 XP and 10 hi-potion can be acquired. You will need to search for the hunters' boss and you can find him at a shed nearby the diner. To know where the dog tag is, you'd need to talk to the person inside. For "Search and Rescue", there will be a man sitting right at the intersection. You might need your potion for the completion of this quest.
For the "Dust to Dust" quest, you would need to go to the marker and defeat your enemies. Then near the car, there will be the dog tag that you need. For the "Unlucky Driver" quest, another man would need a repair kit down Longwythe Peak. For the "Broken Down" quest, you're going to need to help a man with a broken down car. For "Kitty Catering" completion, you would need to meet Galdin first before this quest could be initiated. For this quest, you'd need to interact with the cat, catch a fish, cook the fish and then feed the feline.