Final Fantasy 15 Walkthrough: Chapter 2 - No Turning Back, Keycatrich Trench - Prima Games

Final Fantasy 15 Walkthrough: Chapter 2 – No Turning Back, Keycatrich Trench

by Bryan Dawson

When you reach Chapter 2 – No Turning Back, you’re just starting to get into the meat of the game. This walkthrough of Final Fantasy 15, Chapter 2 also covers the Keycatrich Trench and the Arachne boss battle within. Noctis will also acquire the Sword of the Wise and Axe of the Conqueror, two very powerful weapons.

Quest: Legacy
Recommended Level: 5

Head into the nearby garage and speak with Cid. After the initial cutscene, walk back out of the garage, then speak with Cid again when the question mark appears over his head to begin the Cid Sophiar, Master Mechanic side quest.

When you’re ready to continue Legacy, make your way out to the Prairie Outpost, which is the next waypoint marker. Speak with the woman at the outpost (Monica), then head to the next waypoint marker to enter the Tomb of the Wise, meet up with Cor and complete the quest. There will be several enemies along the way, so be ready to fight or run past them.

Quest: The Power of Kings
Recommended Level: 6

Speak with Cor again after completing the Legacy quest and you immediately begin The Power of Kings. Your are now tasked with reaching the Keycatrich Trench, your next destination.

Keycatrich Trench Dungeon

When you get into the Trench, collect the Metal Scrap on the ground in the first room, then follow the cable when it heads down the corridor to the right, then turn on the generator when you get to the next turn.

Continue to the left from the generator, then down the corridor to the right to get back to the main path you were just on. At the end of the path, collect the Electrolytic Condenser item in the corner, then head around the corner and down the next hallway to the right. There’s a gate on the right at the end of the corridor, but pick up the Carbon Bangle on the ground to the left first.

Keep moving down the corridor and collect the Rusted Bit in the corner to the right. Continue down the hallway, past the locked door on the left. Most of the doors in this area are locked for now. Keep moving down the corridor until you reach the large room at the end. Absorb the ice energy to the right, collect the Oracle Ascension Coin in the far left corner, then check the door to the left to find that it’s locked. Luckily, the doors you just passed are all now open.

Head back down the corridor you just came through and move into the door in the first alcove to the left. Continue down the stairs then pick up the Ether in the first room to the left before you proceed farther into the cave. When you reach the stairs at the end, go up and open the door at the top to find yourself at the other end of the hallway you were just in.

There are enemies and an item to the right, but you can circle around to the left to collect some items before you fight. Head left to find a thunder energy point in the first room to the right, as well as another Electrolytic Condenser item in the far left corner. There’s  also a Rusted Bit in the small alcove just ahead and to the left.

Continue down the corridor to the right (just opposite the Rusted Bit) and open the gate at the end. Crawl under the rocks, then collect the Bronze Bangle on the ground and prepare to fight as several Goblins burst through the door ahead. Kill the enemies to find yourself back in the room where you absorbed the ice energy earlier.

Head down the corridor to the right. If you collect the Green Choker on the ground in the last alcove on the right, Goblins attack from just beyond. Make quick work of the enemies, then head under the rocks in the alcove on the other side of the hallway. To the right there’s another Oracle Ascension Coin on the ground, but the lights will go off and more Goblins will attack as you approach the item.

Take out the enemies, collect the loot, then head in the opposite direction down the corridor. Squeeze through the small opening on the far end of the cave, collect the Elixir on the ground, then open the first door on the left (there’s a secondary path on the right just before the door, but we’ll get to that path). Inside the room you’ll find more Goblins. Clear the enemies, then turn on the generator in the fenced in area.

Head back out into the corridor and continue to the left. The door to the right won’t open, so head left at the end of the corridor and continue through the next gate. Before you open the first door on the right, pick up the Elixir at the end of the hall. Head through the door and absorb the fire energy on the left side of the room. If you go through the door in the far left corner, enemies will spawn in the main room that you’ll have to take out before going through the door in the far right corner.

Pick up the Auto Crossbow on the ground and collect the Hi-Elixir in the hallway to the left that leads to a dead end. Go back to the previous hallway and head into the next room to fight against the Arachne boss.

Boss Battle: Arachne

  • HP: 18,053
  • Strong Against: Greatsword, Machinery, Fire Light
  • Weak Against: Lightning

The Arachne boss is only weak to lightning based attacks, so make sure you have Thunder spells ready to go before the fight (or make them when the fight begins). Opening the fight with a Thunder spell works well so you don’t hit your party members.

You want to focus your attacks on the back side of Arachne so you can get the bonus damage. Ideally you want a party member nearby so you can really maximize the damage with combos. The Arachne occasionally tosses out a petrify attack from the back, but it’s difficult to dodge unless you’re constantly on the move, which means you won’t be attacking. The petrify attack doesn’t inflict that much damage, so it’s best to just continue your onslaught and not worry too much about it. However, if you’re in the process of moving in, trying to move around to attack the Arachne‘s back side, stay on the move to avoid the attack.

Watch out for attacks from all angles when Arachne looks like it’s charging up. Stand back so you can easily dodge any of the attacks that follow. If you see the indicator to dodge, it is imperative that you get into a position in which you can properly dodge. That means stay out of the air unless you have unlocked the air dodge skill. If you fail to dodge and instead get hit by the huge jumping attack that follows, you will take significant damage. This is by far the most damaging attack in the Arachne’s arsenal.

Once the boss is down, you can head through the door to the south to get behind the last door that was locked before. There’s a Laser Senor item to the left and the locked door to the right. Open the door and collect the item. If you didn’t take the looping hallway before, this is where it led. It loops around back to where you were previously. Explore the area if needed, then head back into the room where you fought the boss and crawl under the rubble to the north.

When you reach the end, head into the Tomb of the Conqueror to the left. Collect the Axe of the Conqueror to complete the quest and finish your time in the dungeon.

Quest: Declaration of War
Recommended Level: 8

As you leave the dungeon you’ll get a call that begins this quest. Head back and speak with Monica again, then travel to the next waypoint marker to meet up with Monica again in a moderately hidden area between the canyon walls.

After the conversation the party splits up. Squeeze through the rock walls to find Cor, then open the door ahead and collect the Hi-Potion to the left. Head through the complex, taking out soldiers as you go. Once you’ve got the main gate open you need to battle against the MA-X Cuirass and a few more soldiers.

Focus on the soldiers first, then take out the legs of the Cuirass to drop it to the ground so you can take it down with ease. Be very careful not to get hit by the missiles the Cuirass launches as they inflict significant damage. In addition, if you’re close to the Cuirass while it’s up and moving, it can stomp on you, inflicting considerable damage. Defeat the soldiers and Cuirass to complete the quest and finish off the chapter.

Move on to Chapter 3 – The Open World (coming soon!) or head back to our Final Fantasy 15 walkthrough and guide!