Ninety Nine Nights Tyurru Mission 4
Mission 4. Phoyla Flatlands.
At the start of this mission there will be two groups of enemies with a group of allies fighting each one.
The easiest thing to do here is to stand outside of the groups and shoot at them. After you fight these enemies for a while, Gweg forces will approach from the east.
Head toward the Gwegs. Once you kill enough of them, you will get a cutscene. Then you will be instructed to defeat Dwingvatt.
You can effectively stand far away from Dwingvatt that he will continue to attack your allies, while you kill him with your X attack. Immediately after defeating him, you will be ordered to find Dwykfarrio and defeat him. He is located in the northeast corner of the map.
Try avoid Dwykfarrio while you kill all the other enemies in the area. Then attack him from a distance while your allies take the damage. Once you defeat him, there will be a movie scene. Afterwards, you will be instructed to defeat the Arrphann. Head slightly southwest to reach them.
After you defeat them, you will be ordered to find Yesperratt.
Head toward the area highlighted on your minimap. As you approach her, you will go through some dialog. You will then have to fight her. An easy way to do this is to stand out of the range in which she will attack you, then use your LT+Y move and hit the water bubbles at her.
The mission will end after you defeat Yesperratt.
You are now done with all of Tyurru's missions.