[8.9]. Mission 9 - Skedar Ruins: Battle Shrine (3)

Identify temple targets: Move forward and kill the Skedar Monster to your right with the Falcon 2. Equip the R Tracker to find obelisks, which appear as yellow dots on your (HUD (heads-up display — the on-screen icons showing health, ammo and the minimap)) radar (your minimap with nearby blips and threats marked). Place a Target Tracer on each obelisk that matches a yellow dot on your radar. Navigate through the area, killing monsters (including a cloaked one), and locate obelisks. Continue through paths, killing monsters, and place a target amplifier on any required obelisks found. Explore further, turn right at the foot of stairs to find an opening with an obelisk, kill monsters, and place a target amplifier if needed. Completing this objective requires finding three obelisks.

Activate bridge: Leave the area, go left, and then right at a fork. Equip the Devastator set to Wall Hugger. Shoot a grenade at the wall behind the monster below the edge. If the bridge is absent, fall to the ledge below, kill the monster behind you, and follow the path until ledges combine. Climb up the wall on the left. Run down the path and hop into the next area, killing monsters. Go straight until the second left turn, facing a wall. Use the IR Scanner to identify a lighter red wall, indicating it can be blown up. Use a grenade to open it and follow the tunnels. Once you drop down, go left and through the first door on the right. In this room, kill the tiny monster and push the movable stone onto the light brown area to activate the bridge.

Enter Inner Sanctum: Cross the newly activated bridge. Leave the room, go right, follow the path, and cross the bridge. Continue forward, equip the IR Scanner, and kill any approaching monsters. Proceed until you reach an area with a door to the left and a ramp to the right. Go up the ramp and through the door. Stay at the doorway and kill the two monsters below with Rocket Launchers. Cross the bridge and kill the monster guarding the door. Drop off the right side of the bridge and go to the left of the spinning pillar to find a Skedar cross. Interact with the cross to make a sacrifice, which unlocks the door. Enter the door.

Destroy secret Skedar army: In the next room, defeat the Skedar Army emerging one by one from green capsules. Use the Mauler or Callistgo guns.

Assassinate Skedar leader: After defeating the army, proceed through the next door. In the final boss room, shoot the Skedar leader until his shields turn green. Then, shoot the spikes behind him. He will eventually chase you; evade him and kill any minions he sends. After destroying all spikes except the center one, use the Callisto's rapid fire function to damage the large spike and defeat the leader.