Left 4 Dead 2

Enter the gun shop to get a detailed description of all weapons, except for the grenade launcher.

Enter the Developer Commentary mode for the Parish. Go to level 2. When at the bus depot, only two to four Infected will appear.

In the bar in the abandoned town, find the jukebox and play it to hear "Eat Your Brains" by Jonathan Coulton.

Created by iYoghurt.

Either play the German version of the game or have someone with the German version in your game. Weapons from Counter-Strike: Source will spawn on the table.

Use the shove move on a Hunter while he is jumping at you to force him to stumble back, therefore preventing him from landing on you. Doing this for the Jockey works as well. However it does not work for a Charger who is running, a Witch, or Tank.

Use the following tactics to kill playable and special Infected.

Playable Infected

• Charger: Get close to it. This will prevent it from charging and it can only inflict melee damage. This makes it easier for you to kill it with any weapon (melee and guns alike).
• Jockey: Get into a huddle with your teammates and wait for the Jockey to present itself. When you see it, all teammates can fire on the Jockey at the same time. Huddling together will prevent it from launching at you.
• Smoker: Use similar strategy as the Charger. You must get directly in front of it before disposing it. Smokers use their tongues to grab survivors from far distances but it cannot do that when you are in its face.

Special Infected

• Hunter: When it is in its pouncing position, use a shotgun to nudge it away, then shoot it in the face.
• Boomer: Aim for the stomach and stay as far back as possible.
• Spitter: Aim for the head and be ready to leap out of the way.
• Tank: Get to high ground and shoot it out. In co-op mode, use a grenade launcher for a frontal assault while your teammates fire at its back with shotguns. An alternate method is to deal no damage to the Tank, but instead hide somewhere and let the survivor A.I. deal with it.

Use an adrenaline shot, then use your medikit to heal. This takes a lot less time, especially when you are dealing with a horde.

You can kill zombies by jumping on them. When on a high ledge (any high point where you can jump over Infected) and there are infected below you, drop down on top of them and they will die.

In the second level of "The Parish" chapter, when you get to the bar with the jukebox inside, keep skipping through the songs. It will eventually play the song "I'm Still Alive" from Portal.