After completing "Inside Job," the next mission is "Tunnel Vision." This mission is also straightforward and not too difficult, except for one section where you must escape the tunnels while being attacked by a large number of mercenaries.
This mission can be started by answering a call from the payphone located at Los Santos International Airport. Once again, look for the yellow "A" icon on the map.
Once the mission begins, you will be instructed to head to Platform 1 at the LSIA Terminal 4 station. When you go underground, you will encounter several guards along the way to the platform.
It is up to you whether you want to go in guns blazing, but using a stealthy approach is much faster since you will not need to constantly take cover while fighting mercenaries. This section is not difficult, as most enemies are patrolling far apart from one another. Use a suppressed weapon and aim for headshots.
Continue making your way toward the platform, and you will eventually come across a staircase leading down to it. Here, first eliminate the enemy closest to you, then take out the one on the left, followed by the guard at the computer.
After that, there is one more guard on the right, positioned farther away from the others. Take him out and then enter the train.
Once you are inside the train, interact with the control panel to begin the hack. This hack is a classic mini game where you must combine the numbers on the left with the modifiers on the right to reach the target number shown at the top.
To solve this, you first need to understand what the modifiers represent. Each modifier on the right corresponds to a specific multiplier that is applied to the numbers on the left. The image below shows what each modifier represents:
Match the numbers with the multipliers on the right to reach the target number at the top and complete the puzzle. Both the numbers and the modifiers are randomized. You must complete the hack before the battery runs out, which is shown in the bottom left corner of the hacking interface.
Once you have hacked the train, wait for it to move and reach the ambush point. When it arrives, exit the train and take cover behind one of the nearby objects, such as a stack of cement bags. Once the target train arrives, eliminate the guards and the target inside.
Enter the train and collect the briefcase. After that, simply deliver the briefcase to Avi's dead drop to complete the mission.
However, it's not quite that easy. As soon as you collect the briefcase, quickly exit the train and take cover again, as a large number of mercenaries will ambush you. Stay in cover and eliminate them all before moving on. After dealing with the incoming mercenaries, head to the container slightly ahead of you. This container has two bikes that you can use to escape the tunnels.
Get on a bike and make a run for the exit. You will encounter many mercenaries along the way. This section is not too difficult as long as you keep moving and avoid getting stuck. It becomes more challenging if you are playing on Hard difficulty, but there is a simple trick that can make it much easier.
As you move through the tunnels, the enemies are positioned with small gaps between each group. These gaps are the safest places to briefly stop and recover. If you stay out of combat for a short time, your health will regenerate slightly. This tip is especially useful if you are attempting the "No Armor or Snacks" challenge for Career Progress. Otherwise, it is recommended to keep your Interaction Menu open and use snacks and armor to heal as you ride through the tunnels.
Once you are out of the tunnels, use the ramp on the right to jump off the train tracks and into the sewage area. When you land, turn left onto the main road and follow the navigation to Avi's dead drop to complete the mission.
The bike is faster than the mercenaries that spawn to chase you, so you should be able to outrun them easily without taking any damage along the way.
Now you are ready to take on one final mission before moving on to the finale. Check out our guide for the next mission, "Trash Talking," or return to our main KnoWay Out mission hub.
