Metro 2033/Chapter 2 "Bourbon"

After a few drinks, you should be ready to head out. Collect the extra ammo that you received (and there is also another ammo clip as well.) Head outside, and approach the small child. He will tell you that a man wants to meet you; the child will guide you for one bullet to a man named Bourbon.

When you reach him, accept the offer to start the next mission. He will give you some ammo as well. You can also find free bullets on a nearby table. Follow him - he should have a flashlight as he approaches the dark corner.

Lost Tunnels
Aside from a single lurker who will run away, there is not much threat from mutants. There will be a bat scare further along, where you can find a dead body with a few clips of ammo. Beyond the wrecked train cart will be a dead caravan group. Collect all ammo from them, and follow Bourbon to the right. Avoid both the cans and tripwire that you spot.

When you approach the darkened room, hide in the corner as instructed, and wait for that wandering guard to get taken out. Collect his ammo, and proceed to the next room.

In this room are several bandits that have setup a barricade. You will need to kill them, and the safest way to do so is to sneak around the far side of the room. Make sure you avoid broken glass, as that will place the enemies on full alert - such glass is seen as a white spot on the grayish floor.

Once you make the first kill, the enemies may become alert. You can continue to snipe at them as long as you remain in dark areas.

When they are all eliminated, Bourbon will advance to the door located on the left-hand side of the room. Open it. There will be two more bandits covering the door. The closer one will take cover behind a wall, while you can use the door as cover. The second one has a shotgun and hides behind a sandbag wall. He can be sniped at a long range safely. The third one will face the sandbag wall, and may be snuck up on for a knife kill.

Going through the next door leads you to the bridge.

The Bridge
You will first need a running jump to the main bridge section, and use the gas mask whenever you are on the lower level. The enemies are mainly lurkers that attack in small groups.

After climbing back up, there will be a military trolley searching for bandits. Wait for it to depart, then continue.

When you reach the train, run towards the exit before it falls down. You will reach a staircase that is lowered. Once it is down, sprint into the tunnel, jump over the tripwire to reach the next level. The enemy

The Lost Catacombs
You end up in a radioactive graveyard. Search the bodies as instructed, and wait for Bourbon to open the gate. Once it is open, run towards it.

If you want to collect ammo, and possibly a better revolver, you can turn towards the cylindrical chamber containing side railings. Run and jump to the body, and grab the ammo and weapon. Run back, as the railing holding the body will collapse.

When you reach the gate, the sentries will signal to release the trolly as the lurkers approach. Hold your ground, and kill the lurkers as they attack.

Market
In the market, you will need to head to the weapon store to purchase additional filters. They cost 8 bullets. This will be the last chance for you to purchase filters - make sure you have at least 20 minutes of filters unless you are confident enough to know where they are located in later levels. It is also possible to extend the life of filters slightly by constantly removing and wearing the gas mask, since you are free to use breathe the toxic fumes for about 30 seconds before dying.

You may also purchase sticky grenades for 16 bullets, throwing knives for 8, and medkits for 8.

Once you do, head back to Bourbon, and watch him as he asks to open the gate.

Dead City
Dead City consists of two maps, and you must be using the gas mask at all times.

In the station, you will be able to find a bit of ammo which you may scavenge. When outside, a winged mutant will fly by; hide next to the pillars. Once it escapes, jump across the cars to follow Bourbon, but the cars will fall into the water below. You will need to find the other way around through the buildings.

The first building has a mutant on the first floor. There are also two bodies containg ammo, and one with a spare filter. Climb to the third floor, and exit the building at the side. You will need to deal with three mutants here.

When you reach the playground, you may be attacked by additional lurkers, even when seeing the greenish version. Once it subsides, search the truck on the opposite side of the playground, and enter the building to the left. Search the building for a body, and a closed ammo crate. Exit the building by the window, and defeat the lurkers outside. There are two bodies outside as well - one is in the crack behind the building, and one is lower down near the radioactive river.

Next, you will cross the river, but you can obtain a two sticky grenades from the truck by jumping into its cargo hold. Once you have the bombs, return to the stairway and continue. You should get close to a flying mutant, which you may scare off or destroy by using a sticky grenade. Search the body it was eating, and head down to search the second body. You can also look in a truck for additional supplies.

To exit the first map, approach the nearby builidng, and walk towards the light. If you want additional supplied, including a new filter, turn right and jump over the rope. Once you have the supplies, collect the grenades from the traps and proceed down the stairs.

After the transition to the second part, turn around to collect ammunition from the dead bodies behind you. You may now follow the path forward, searching bodies as desired (including one up the staircase), and to the surface. You should encounter Bourbon.

Follow him, and you will encounter the flying mutant. This will then be followed by a large wave of lurkers. During the fight, he will fall back towards the corner. When the flying mutant arrives, Bourbon will assist you in evading combat in a cutscene.