Level 3: Public Library - part 3 Ghostbusters Guide
Last update: 11 May 2016
You'll end up standing in a large hall and being surrounded by new objects. Head on to a portal located in the center of the room. Once you're close enough it'll disappear and you'll have to defeat a new Book Golem. Notice that you can't rely on your teammates this time, so you should start using the Proton Gun right away, without slowing down its movements first. Weaken the beast and perform an "execution" to get rid of it.
Use the stairs when it's safe and turn left after you reach a large gate. Proceed towards a new teleportation device. Head on to the other side, make a few steps forward and choose the PKE meter from your inventory. Find and collect the fifth artifact - Ali El-Baluu's Irksome Rug.
Go back to the main hall with other portals. This time you'll have to choose a portal located to the right of the main gate, so it'll be directly in front of where you're standing. Head forward, however watch out for a new golem along the way. Use your Proton Gun and prevent the creature from hitting you. Rejoin with the rest of your squad and you'll find out that you've been awarded with a new type of an attack, called Slime Tether.
Approach a huge drawbridge and take your time to see how your new ability works. Be patient, because the first part of the drawbridge is going to be lowered by one of your colleagues. Approach the other part. Aim one end of the rope at the bridge and the other end at the ledge you're standing on. If you've done everything according to the plan you'll notice that the bridge is being lowered. If you're unlucky try again or attach two ropes to the same object.
You may proceed forward and eventually you'll end up standing inside a room with a large movable object. Attach one end of the rope to the object and the other end to the wall. Repeat this a few more times and you'll uncover a portal hidden in one of the walls.
Keep following your colleague, but sadly one of the portals he'll use is going to disappear right in front of your nose. Get ready to take a scan of a new phantom, marked as the Cultist. I would recommend using your Proton Gun during the course of this battle, but don't forget to keep moving, so you won't be an easy target.
Once the ghost has disappeared proceed to the opposite end of this hallway and stop near the mirrors. Wait for the Cultist to show up again and this time you'll be allowed to get rid of it once and for all. Remember to place a trap on the ground once it's been properly weakened. Once you've won go to a newly unlocked portal.
Keep running forward and continue eliminating less powerful creatures as you progress. Eventually you'll have to get to a new teleportation device. Ignore smaller ghosts flying around you, because you won't be bothered by them. Instead turn right and head upwards until you find the next portal.
You'll now have to take part in a series of standard fights and to be more specific you'll be going against small group of Paper Construct creatures. Keep using the teleportation devices and remember to move slowly, so you'll receive points for each kill.
Your top priority at the moment will be to reach a large entrance which will be located to your left. Look around when you get to a room with floor upside down. The sixth artifact (Featherwell's Stalking Chair) can be found near the roof, to your left. You may proceed towards the exit.
Eventually you should be able to get to the stairs floating in the air. Start heading upwards and watch out for new "haunted books" along the way. Thankfully it won't be hard here to prevail. You can fight the books or you can leave dangerous areas as soon as possible.
You'll have to use the rope (Slime Tether) a few times along the way. Aim the rope at the upper sections of the stairs and then attach the other end to the platform you're standing on. The final phase of this approach will allow you to launch a rope at a floating platform located to your right.
Pull the platform and once you're on it you'll have to launch the rope at least two more times to get to a new portal. Step through the portal and witness a new cut-scene. Get ready to defeat the final boss of the library - a powerful demon called Azetlor the Destroyer. Start off by scanning the beast.
Make sure to follow instructions given to you by other members of your team. As a result you should choose the Slime Gun from your inventory. Use this weapon to destroy some kind of a defensive layer surrounding the beast. Aim for the upper parts of its body and make sure to keep moving. Don't forget to revive your teammates each time they're in need of healing.
The second phase of this duel will require you to switch weapons. Start using the Proton Gun and aim for the large mask. Use capture stream ability to rip it off. Doing this will allow you to focus on attacking Azetlor's eye. It shouldn't take too long for you to win. Once the boss is gone step through the last portal to end this quite challenging mission.