Hidden Spider 81 — You can find the 1st one of the first reactor room in Lab 1. It will be at the very top of the entrance structure on the side of the room where the reactor core is located at.
Hidden Spider 82 — You can find the 2nd one in the first room you originally were, and the same room you re-enter after you pull out the reactor core. It is right below the entrance to the reactor room crawling inside of a hexagon structure that is on the wall.
Hidden Spider 83 — You can find the 3rd one in the reactor core room of Lab 2. It will be down below the walkway on the right side as your entering, crawling on top of an exhaust fan.
Hidden Spider 84 — You can find the 4th one inside the entrance of Lab 3 at the top right side. It will be crawling on top of the balcony that is high above.
Hidden Spider 85 — You can find the 5th one in Lab 3 on your way to the reactor core. It will be in the same room where you have to save 3 scientists. It is on the first platform to the right as you enter this area, and behind a glass wall on the ground that you need to web-pull to get inside.
Hidden Spider 86 — You can find the 6th one in Lab 3 inside of the reactor core room. It will be right behind the scorpion hologram crawling on the ground and in front reactor core.
Hidden Spider 87 — You can find the 7th one in Lab 4 in a green structure on the left wall with purple and green power lines inside. It will be at the very top inside this structure, wall crawl up there.
Hidden Spider 88 — You can find the 8th one in Lab 4 in the 4th and final reactor core room. It is crawling on the right side wall in the middle of the room.
This video shows how to find all 8 Hidden Spiders in level 11 “Doctor Octopus”:
Hidden Spider 89 — You can find the 1st one in the first large area where you first come in contact with the zombies. It will be on the 2nd floor at the end of the hallway crawling on the ground behind a bunch of crates.
Hidden Spider 90 — You can find the 2nd one in the open area outside after dropping down from the loading dock. It will be right before the large fire. It is crawling on a cargo container right behind a jet fighter.
Hidden Spider 91 — You can find the 3rd one just after jumping across the debris inside of the fire. It will be inside the first door to the left, on the left side of this area. You will need to web pull on the door to get inside and it will be crawling on the ground at the end.
Hidden Spider 92 — You can find the 4th one inside one of the jail cells on the 3rd floor towards the left of the exit. It is crawling inside the jail cell on the ground.
Hidden Spider 93 — You can find the 5th one in the area where you have to save 1 scientist. It will be all the way towards the end on the left side on the 2nd floor inside a jail cell on the ground.
Hidden Spider 94 — You can find the 6th one inside of the loading dock where you bring the scientist to from the previous area. It will be crawling on the floor underneath the raised platform.
Hidden Spider 95 — You can find the 7th one in the area just after where you found Hidden Spider #6. It is ahead of where you enter crawling on top of a jet fighters wing covered in carnage goo.
Hidden Spider 96 — You can find the 8th one once you have entered the building after swinging away from a crashing S.H.I.E.L.D. Helicarrier. It will be to the right side of the large broken window that you will need to climb out of to proceed to the rooftop area.
This video shows how to find all 8 Hidden Spiders in level 12 “Carnage”:
There are no Hidden Spiders located in the Final Act.
This completes the guide, congratulations on finding all the hidden spiders! Stay tuned as we’ll try and add more details. Thanks for visiting!