June 29, 2013 / Tall Oaks, USA
Forest Cemetery
Wait to hear all the dialog before you take a few steps forward and witness Leon and Helena enter the cathedral grounds. Turn around and break open the crates before continuing around a corner to a tomb. Do not jump down and walk behind the tomb marker for a Serpent Emblem and a crate. Now drop into the underground through the crypt's cover.
Follow the path to a chest with a rusty lock and shoot it off to get the Simmons Family Crest Piece A. The doors will close and two corpses will drop down behind you. Kill them and head into the next room for some crates and grapple up into the gap to continue.
Climb the ladder and examine the door across the way twice to place the first puzzle piece and then head right, taking the first left twice to come crates. Return to the path to the right and head straight to a sarcophagus that can be opened for a Green Herb before entering the tomb that was opened.
Follow the path to a red door and enter a chamber with many iron doors. Ignore the doors and take the stairs on your left to a crate and then shoot the lock on the stairs to drop a platform that can be crossed to the Amber Key.
Head back downstairs and open the door on your left with a chest in the middle of the room. As you enter a zombie will drop the crate into a pit and then attack you. Kill him and break open the crates in the room, making sure to also get the Sniper Rifle. If you take a second to look up, you will notice that corpses are held above you by padlocks that you can shoot to drop them. Take a minute to shoot each one down ONCE for items.
Head to the left side of the lever, the side the rifle was on, and push it to be directly below the hanging corpse and shoot him down to hold the lever. You can now jump into the hole and grab the Simmons Family Crest Piece B.
To get out of the room, push the two chaired zombies onto the electric circuits nearby, giving yourself a small shock as well. When a third zombie drops from the ceiling, lure it over the third circuit and melee attack it to finish the puzzle and return to the main room.
With the power restored, pull the lever to the next room and watch as three zombies enter and then jump across and the floor will collapse due to the weight. Gather any items dropped and break open the crates before you crawl through the vent and head back to the main room again where the camera focuses on the pinned zombie on the wall. As you probably guessed, you need to use the crossbow to pin the zombies to the wall so you can jump across and collect the Simmons Family Ring.
Return to the room with the hanging zombies and examine the door at the back to exit the underground and grapple across the area until you find the skull with missing pieces that cloaked zombies seem to be wearing.
Break open the crates on the first floor and then climb the ladder to more crates and a room full of zombies. Kill the zombies and then pursue the cloaked zombie into another room will cells, that will once again release a hoard of zombies. Continue into the final hoard and kill all the enemies, including the cloaked one, and pick up the Skull's Gold Tooth.
Head through the vent back to the main room and place the tooth on the skull.
Switch to your Ammo Box 50 and then grapple up to the other ladder. As you walk into the room you will fall into a trap with a spinning blade. Immediately hold down on your L stick and hit X/A to crawl away. When the path turns to Ada's right, hit L1/LT to arm yourself and crawl forward as you kill two spitting zombies. Once they are dead, continue to crawl forward and take a left when a Whopper blocks your path.
Exit the crawl space and attack the cloacked zombie, ignoring the Whopper. Once you defeat the cloacked zombie, grab the ''Skull's Red Eye'' and the skill points dropped by the Whopper, who has probably been killed by the spinning blades. Return to the skull and place the eye to continue and get the Simmons Family Crest Piece C.
Follow the path to the crypt exit and place the final two pieces to drop into another room. Immediately turn around and look up for another Serpent Emblem and then continue to the altar corridor.
Altar Corridor
The following section you should know how to play, due to completing Leon's Campaign.
When Deborah first mutates, a single hit on her glowing orbs will drop you into the depths and split you and Leon up from Helena. Follow the path, using the partner actions to get across the gaps, until you reach the first major fight with Deborah.
Focus on her glowing spots and keep moving. Watch out for when she drops down and tries to pounch on you as you lure her to the TNT crates and use them to blow her up. When enough damage is dealt, you will drop below and be with Helena this time.
Jump into the cart and cover Leon as he makes his way down and eventually joins you. Ride it, avoiding the obstacles and shooting the TNT crates that block your path. When you crash at the bottom, wait for Leon to save you and then take out Deborah to save Helena.
When you have control of Ada again, continue forward to break open the pots and ride the elevator to the underground lab.
Underground Lab
Break the crates outside the elevator and head through the door where there are two Whoopers you'll want to kill. Use grenades, the generators, and your Shotgun focused on their legs to take them out and get the Laboratory Key.
Once they are dead, clear the area of crates and head to the stairs near the water, where another Whooper will come in for the attack. Kill the beast and then head back to the steps to shoot a Serpent Emblem.
Once the whole area is clear, go to the door on the opposite side of the area and unlock the door to grapple up to another Whooper. Kill the thing and then break the crates as you advance, but be careful of the Napad that burst through the door. Kill it with your Shotgun and get then get the 4,000 Skill Points from the chest that was caged with it.
Continue on to another crate and hallway, where a Napad burst through, and then jump down into the water. Instead of running down the tunnel, turn around to shoot a Serpent Emblem and open some crates. Continue down the tunnel, under the grate, and grapple up to the experiment room.
You know this area from Leon's Campaign and while the chrystalis did not break then, they will break soon enough. Clear the area of crates and then continue to set off the alarm and have all the chrystalis' break and release Napads. Luckily, the Napad's will not all break at the same time, so kill them quickly and you will be much safer. Start by luring each into a generator and shooting it with your handgun and then unload a Shotgun or Sniper Rifle into it until dead. Watch the red arrows to make sure nothing is coming from behind and when all enemies are defeated the doors will open.
Finish breaking all the crates in the area and continue to the room where Leon saw the tape of a chrystalis Ada to watch it as well.
Trophy/Acheivement - Counterintelligence
| Rank | Accuracy % | Deaths | Clear Time (mins) | Enemies Routed |
| A | 70 | 2 | 45 | 30 |
| B | 60 | 3 | 70 | 20 |
| C | 50 | 5 | 90 | 10 |
| D | 49 or below | 6+ | 91+ | 9 or below |


