Big Lyre
This big lyre can be found east of the God of War fast travel point.
To play the big lyre, you’ll need to first find the 4 small lyres scattered around War’s Den. They will give you the order of the strings to play on the big lyre. At the big lyre, shoot the strings with arrows in the correct order to receive Coins of Charon.
Small Lyres
This lyre can be found northeast of the Protector Drakon Ismenios fast travel point next to a chest.
To access it underneath the giant statue, you’ll need to first raise the gate. To do this, you’ll need to activate both pedestals in all 4 burrows. We started at the one on the left (east side). Pull the lever then sprint over the laser beams into the next room then activate the pedestal on the left. This will cage you in with lasers. Sprint through the lasers and into the room that was previously blocked with a barrier to activate that pedestal. For the next burrow that is slightly back farther to the left, pull the lever and run through the lasers to enter the room. Activate the pedestal in front of you then run through the lasers to activate that one as well. Head on over to the next building. Again pull the lever in front then either run through or jump over the lasers. Once inside activate the pedestal then use the cube to block some of the lasers so you can activate the pedestal in the next room. Head to the next building in line to again pull the lever and make it through the lasers. Once inside activate the pedestal then leave a clone of yourself on the platform. Grab the cube and put it in front of the lasers to reach the pedestal in the next room. Activate it then head back to the lyre to see that the gate has been lifted. Pull the lever to see what order you need to step on the platforms. The order is 31425. Head inside the next room to play the lyre. The order of the strings is 213234.
This lyre can be found west of the Vault of Ares in the far western part of War’s Den.
To unlock the lyre, you’ll need to use Apollo’s Arrow to light the braziers in the correct order as shown on the wall. Play the lyre to get the following order of the strings: 311243.
This lyre can be found southeast of the Vault of Ares in the far western part of War’s Den.
To unlock the pedestals in front of the entrance, you’ll need to use Apollo’s Arrow to light the brazier on the back of each neck of the giant statues in the water. The last brazier can be found behind a large pot on the ledge of the cliff on the east behind the giant’s hand that is holding a boat. Once all braziers have been lit, activate the pedestals to remove the barrier. Head inside to play the lyre. The order of the strings is 231424.
This lyre can be found inside a building on the southwestern side of Ajax’s Fort.
To unlock it, head to the top of the structure to the left of the circular platform to find another circular platform. Stand on it then grab the cube that was previously behind the barrier. Jump back down and face the entrance. Climb up to the top left side then pull the cube towards you which will cause it to fall. Jump down then smash the breakable wall to the left of the entrance and retrieve the cube. Stand on the circular platform in the center of the room and throw a cube threw where each barrier was to raise the gate in the middle. Head up the stairs to play the lyre. The order of the strings is 11423.