Pyromaniac Achievement in Assassin's Creed: Revelations
Complete all Bomb Missions.
How to unlock Pyromaniac
These bomb missions are actually more like tutorials. They are given at Piri Reis near the Grand Bazaar in the Imperial District. The icon is black with a white bomb and beakers. It shows up after you progress through the story and learn about bombs. Inside you must go to the wall near his desk. You will see 4 paintings. Each one has 2 missions total, and you must complete one to get the other. They stop shining after you have done both. They are extremely easy missions and short. You will have to run back to the shop after doing them, you are not automatically put back inside.