The following section of the guide to Marvel's Spider-Man breaks down the "Snipe Hunt" side quest.
Mission's starting location: Financial district
Reward: 3000 XP.
Talk to the policeman and you will learn of the wave of attacks by dangerous snipers. Go to the marked location and you shall be able to spot a single sniper atop the building. Approach him and take him down fast. You will find out that he's not the only assassin in the city.
Now, three points will appear on the map, marking the locations of the remaining snipers. You will have a limited amount of time to deal with them. Run towards the nearest point and quickly take the sniper down. The best strategy is to attack from behind.
After taking all of them down, you will receive a phone call. Something bad is going down in the park. Go there - you will learn that the criminals have taken hostages. Your task is to take the enemies down quietly. Take your time - use lamp posts and try to take the enemies one by one. As soon as you see a few enemies next to each other, lure them out, try to separate them. If you become compromised, you will have to start again. Should you encounter any serious trouble with finishing this stage, check out our clip showing a quick solution of the mission.