Going Underground is the fourteenth chapter of Drake's Fortune. Nate ventured alone through the underground catacombs known as the "land of the dead".
Story[]
After Nate and his allies discovered the "land of the dead", Nate decided to explore it by himself. As he did so, he ended up inside the monastery chapel, which was heavily patrolled by Atoq Navarro's mercenaries. Following a big firefight with the troops, Nate spotted two large bells, placed far from each other on opposite sides. Since he was familiar with them, he opened up Francis Drake's diary, turning to a page that read, "Two bells resound in perfect harmony." By getting the bells to chime at the same time, he was able to unlock a secret passage that led him back underground.
Eavesdropping[]
Navarro halts Eddy from shooting Roman.
Nate soon found himself in a room beneath a small mausoleum, where he could overhear a conflict occurring between Eddy and Roman, who was still accompanied by Navarro. Eddy tried explaining to Roman that the island was cursed, as his men were being massacred by something other than Drake. Roman did not believe any of this and dismissed him and his crew, due to them failing to capture Drake and keeping the island secure. Eddy also would not receive a share of the treasure as promised. The enraged Eddy pulled out his gun, only to be halted by Navarro. With no other choice, Eddy left, shouting in anger.
While Roman began questioning Navarro on his ability to find the treasure, the latter was positive the treasure vault was in this monastery but claimed he needed a little more time. Roman believed this treasure hunt has proven to be more trouble than it was probably worth. Navarro assured him that El Dorado was worth more than he could imagine, which Roman was counting on. After overhearing their conversation, Nate continued through the catacombs and was soon led back outside.
Walkthrough[]
After following the stairs down into the first chamber, climb up the ledge to your right to reach the next area. You will be led to a section that opens up to a big pit area. Here you will need to hang off the ledge on the right and shimmy your way across to the other side of the gap. After ascending the small stairs, prepare to fend off a small group of mercenaries, who will immediately begin firing at you upon detection. Protect yourself by taking cover behind the crates. Ideally, any enemy wielding a Desert - 5 should be your first target. Once the area is clear, search for a chain winch along the back wall. Activating it will raise a gate, allowing you to go up a large flight of stairs that lead into the church interior.
Nate ducks beneath a laser sight.
Quickly take cover behind the first pew, as you will soon discover the whole room is guarded by patrolling mercenaries, with a few of them wielding Desert - 5's at the back. The pews will provide sufficient cover, and you can also find a few Mk-NDI grenades lying around. There will not be that many enemies in total as well, so once you have shot everyone down, approach one of the two large bells and pull out Drake's diary.
"Two bells resound in perfect harmony."
Nate will turn to a page that displays two bells, hinting that you need to have the two bells ring simultaneously. This can be achieved in two ways. You can approach a bell and press 
to ring it, then quickly shoot the other. Your other option is to simply shoot both bells quickly. When done correctly, a secret door on the far left end will open up. Pass through to have Nate climb down a ladder that leads back underground.
Once at the bottom, prepare to shoot down more mercenaries who you encounter by surprise. Having a Desert - 5 or SAS - 12 can be useful when fighting these enemies in such tight spaces. Continue following the path, which involves more platforming sequences. Following the cutscene, you will eventually reach a room with a winch that you can activate to open the door to the outside, where the chapter ends.