Achievements part 1
IGN Strategize: Three Weird Achievements
Campaign and Single-Player Achievements
In part 2 of Dark Carnival you'll come across a well-lit shooting range with carnival mascot Moustachio emblazoned on it. Also note the yard gnome in the box -- your prize for getting 750 points. Get this high score by activating the game (via the red button) and shooting everyone but the blue peanut (you'll lose points if you hit this target!). Hit the yellow and green Moustachio target for extra points. The gnome (which you may recognize from Half-Life 2 Episode 2) will be released if you get a high score and so will scores of infected, so beware!.
Carry the gnome all the way to the end of the scenario (board the chopper) to unlock the Guardin' Gnome Achievement. You can drop Gnome Chompsky and pick it back up. You can also drop it in a safe room and it will be there after the break. Finally, you can use the gnome to repel zombies as you would with a weapon.
In part 4 of Dark Carnival, look for well-lit Whac-A-Mole-like arcade game near the start. Activate the button on the front of it and attack the Moustachios that pop up with a melee weapon. At a score of 46, the game will break -- you may need to continue a few times. When it breaks, you'll get the Stache Wacker Achievement (be "faster than Moustachio"). Also, the game will attract zombies.
In part 4 of Dark Carnival, look for a strength-testing game in the first area after exiting the safe room. Inject some adrenaline and nail the red button with a melee weapon to get the Gong Show Achievement (be "stronger than Moustachio"). Note: Will summon infected!
You can do this on Easy and Normal with a shotgun. Only the final shot matters, so this may take a few tries if everyone is firing. Two seconds is a long time in a zombie apocalypse!
After playing for a bit you'll be able to recognize the telltale gurgle of the Spitter and you'll be able catch them before they spit. Luckily, the Spitter has little health, so you can shoot her with an automatic weapon -- a laser site will help you hit her. The Grenade Launcher is another good option.
The incendiary and explosive rounds can be found in any level. You can carry them in your health/defibrillator slot and "deploy" them on the ground. The team will then grab ammo from the little pile and you'll get an Achievement.
This one can only be done on Dark Carnival. On harder difficulties, the uncommon infected "Clown" (a zombie dressed as a Clown) occasionally leads a pack of infected your way. Toss a Molotov its way when it shows up. When a Clown appears, your teammates will usually offer some commentary about "shutting it up."
The CEDA agents are the uncommon infected types in big, yellow hazmat suits. When they die, they sometimes leave Boomer vomit vials behind. Grab ten of these for the Achievement.
The Boomer vomit vile attracts zombies to whatever you toss it at. The Tank is a big target, so hitting it shouldn't be a problem as it charges you.
The incendiary rounds can be found in any level. You can carry them in your health/defibrillator slot and "deploy" them on the ground. Grab some of the ammo stash once its deployed and fire at zombies to work your way towards this Achievement. The ammo only fills a single clip on your secondary weapon slot (no handguns). The automatic rifles have large clip sizes and are ideal choices for incendiary rounds since you'll get more bullets to use.
This one should be fairly easy since the chainsaw cuts through zombies like undead butter.
This one can only be done on Dark Carnival, where the uncommon infected Clown appears occasionally. Use the repelling thrust of your gun (not a melee weapon) to honk a Clown's nose. You can do this repeatedly on one Clown and you don't necessarily need to hit the Clown's face. When a Clown appears, your teammates will usually offer some commentary about "shutting it up."
You must kill one common infected zombie with each of the following weapons. Some melee weapons can only be found in certain scenarios, so here's a list of the weapons and a scenario you can find them in. Many of these can be found in the other scenarios as well.
- Crow bar - Dead Center
- Night stick - The Parish
- Fire axe - Dead Center
- Katana - Dark Carnival
- Machete - The Parish
- Frying Pan - The Parish
- Guitar - Dark Carnival
- Cricket paddle - Dead Center
Note that the Chainsaw does not count for this Achievement -- but it is a melee weapon.
The uncommon infected are those infected in recognizably different costumes. You can find these infected in the following scenarios:
- CEDA Agents (hazmat suits) - The Parish, Dead Center
- Clowns (dressed as Clowns) - Dark Carnival
- Worker Infected (construction workers in neon vests) - Hard Rain
- Swampy Mudmen (submarine traveling Mudmen) - Swamp Fever
Note that the armored Riot Guard is NOT an uncommon infected.