In the next chamber turn left immediately and behind the last column you will find the Locust Tablets.
Approach your squad and choose one of two paths.
Regardless of your choice, both rooms are very similar. Just go ahead and eliminate every enemy you see.
Among them there will be common Drones, Tickers, Therons and also Maulers.
On the right side, you will first meet some basic Drones and also some Tickers.
In the end you will to deal with two Maulers.
You're close to the queen's chamber. Use the mortar while fighting in the long corridor. When you reach the end the floor will go down, and you will be ambushed. Take cover in the corners of the lift and try to kill the enemies as fast as you can. They will appear from four different sides, but try not to run around and expose yourself.
After killing everyone approach the handle and get back up. Enter the throne room.
The queen's appearance can surprise you, but you have already seen Skorge - her sidekick. The fight consists of several phases. Firstly you will have to fight him with a chainsaw. When Skorge will attack you have to rapidly press the B button.
The second phase is all about shooting each other from behind the columns and fighting off Tickers. Avoid the shots by hiding behind covers, while Dom takes care of the Tickers. Nevertheless look out for them. Then he will throw gas grenades. Just avoid them and get out of the zone in which the gas is. Never stay in one place too long, as Skorge can rip off one of the stalactites from the ceiling.
The last phase is a column that will fall at you. Your only chance to avoid it is to jump sideways at the last moment. How much you will have to repeat each phase depends on the difficulty level you've chosen. After Skorge escapes you will receive an order - chase the Locust queen.
Cross the bridges to get to the Reaver stable. Run all the time and don't stop even for a second and you will manage to do it. Now it's time to escape from Nexus.