Getting the Blue Key (11)

In the [Tunnel], start underwater and fight Octabrains. Behind you, find a Shotgun and Shotgun Shells. Blow up a crack in the wall for RPG Ammo and Atomic Health. Swim through and defeat more Octabrains. Find an RPG at the end of the pipe.

Emerge and fight Sentry Drones. On a ledge, find two Laser Tripbombs, two Pistol Ammo, Body Armor, and a Large Medikit. Break a crack in the wall to enter the roadway.

In the [Left Road], prepare for Pig Cops and RPVs under the bridge. Find a Devastator and Atomic Health on a ledge under the bridge.

Fight Pig Cops and Enforcers on a ledge. Find Shotgun Shells in a trash can on the left. In a group of three trash cans, one contains a Shotgun. If you have a Jetpack, you can jump on the trash cans to reach a ledge with Steroids and Devastator Ammo.

Alternatively, blow up a crack on the far right of the ledge to access it. Find a Portable Medikit on this upper ledge. A small ledge near the tunnel has two Small Medikits.

[SECRET 1] At the end of the ledge where it meets the bridge, open a window into a bathroom guarded by a Pig Cop holding a Freezer. The switch only turns on lights.

In the [Right Road], find Shotgun Shells and RPG Ammo behind a box. Fight three Enforcers and three Pig Cops, plus any remaining RPVs.

Jump on the box to reach a platform with Night Vision Goggles. Find Freezer Ammo in a corner on the ground.

Head right (facing the tunnel) and fight more Pig Cops. Enter a building, grab a Large Medikit, and immediately run away as it will explode.

After the explosion, re-enter the building. Find Shotgun Shells behind the fire and fight a weakened Pig Cop.

You will emerge onto the [Main Road]. A Battlelord is at the end; use the median for cover (press the cover button to crouch behind walls or objects). After defeating it, find Devastator Ammo in a corner, a Portable Medikit, and Body Armor on either side of the median.

In a building doorway, fight Pig Cops and find a box of Shotgun Shells. This is also where the Blue Key door is located.

[SECRET 2] In the same doorway, open a secret window to the left. Inside, fight Enforcers, find the Shrink Ray and Devastator Ammo. A staircase leads up; blowing up the door at the top leads to Secret 1's area.

At the far end of the road, to the left, find Pipebombs, Steroids, and two Small Medikits. To the right, Pig Cops are behind a police car. Use Pipebombs, but back off as the car explodes. Find a Large Medikit near the back wall. The Red Key Door is also here. An open manhole in the middle of the road leads back to the start.

Go to the [Fallen Building] on a slant. Jump onto it to find Shotgun Shells. Jump into a crack in the building to find a Jetpack, Shotgun Shells, and a Large Medikit. Jetpack out and go higher.

From the broken building, jump into the window of an adjacent building. Find Pipebombs, Shotgun Shells, and a Small Medikit. The Blue Key is in a corner of this room.

From the window in this room, jump onto a ledge to the left. Find two Atomic Health items on this ledge.