Spider-Man Web of Shadows

Secret Achievement: Grounded
Description: Electro defeated

Unmissable storyline achievement.

Act the end of Act 2, you'll be sent to a S.H.I.E.L.D. safe zone. Upon arrival, Electro will show up in a panic. This will cause you to go on a mission to half chase/half fight him. When this mission completes, you'll get the achievement.

This is very likely the hardest mission and hardest fight in the game. While Electro is on the move, he turns into a lightening bolt, which also means he moves very fast. As it continues on, he'll also set electric traps to slow you down and hurt you. While he's on the move, stay as high as possible. The traps only go up so high and being higher makes it less likely you'll get stuck on a building. Do not try to attack him until he stops for a while.

When he does stop, things can get painful fast. He uses a wide variety of electric attacks, several of which can be very difficult to judge and avoid. What's even worse, later on in the mission he'll begin using several different attacks at one time. If your health ever gets low, get up as high as you can and swing around until it comes back.