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

Identify temple targets: Walk forward and peek through the opening. 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 radar. Place a Target Tracer on each obelisk you need to target. Navigate the area, killing monsters (one is cloaked), and find the first obelisk in the middle. Continue through the next opening, follow the path, and kill more monsters. At a fork, kill the two monsters and take the right path to find another obelisk. Place a target amplifier if needed. Return to the fork, go past it, take the first right, kill the monster, take another right, kill two more monsters, collect their ammo, and take the right path to find another obelisk. Place a target amplifier if needed. Turn around, head towards the other stairs but don't ascend. Turn right at the foot of the stairs to find an opening with another obelisk. Kill the monsters inside and place a target amplifier if needed. Completing this objective requires finding three obelisks.

Activate bridge: Leave the area, run past the two dead monsters before the stairs, and go left. At the fork, go right. Equip the Devastator and set it to Wall Hugger. Shoot a grenade at the wall behind the monster to your left over the edge. Cross the black bridge and go through the opening. If the bridge is absent, fall to the ledge below, turn around and kill the monster, turn again and go forward until the ledges combine. Go to the other ledge and climb up the wall on the left. Run down the path and hop into the next area, killing any monsters. Go straight until the second left turn, facing a wall. Equip the IR Scanner; the wall will appear as a lighter red, indicating it can be destroyed with grenades. Enter the hole and follow the tunnels. Drop down, go left, and enter the first door on the right. In this room, kill the small monster, then go right to a movable stone. Push it onto the light brown area on the ground to activate the bridge and complete the objective.

Assassinate Skedar leader: Cross the newly found bridge by leaving the room, going right, and following the path. Continue forward, equip the IR Scanner, and kill approaching monsters. 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 with Rocket Launchers at the bottom. After they are dead, cross the bridge, kill the monster guarding the door, and enter it. Defeat the Skedar Army, as they emerge one by one from green capsules. Proceed through the next door to the final boss fight. To defeat the boss, shoot him until his shields turn green, then shoot the spikes behind him. He will eventually come down to your level and chase you; run away and kill any minions he summons. After all spikes are destroyed except the center one, shoot the large spike with the Callisto's rapid fire function until it is destroyed. This completes the mission and the game.