Hello and welcome, my name is Snoody. As you may have noticed, this is my first Mobafire build (if you haven't, this is my 100th Mobafire build, all of which have 90+ rating). Cho'Gath was the first champion I ever played in league of legends, and holds a place very close to my heart. The steps to becoming an MLG Cho'Gath cannot be found here, however, if you want a solid grounding that won't give way, this is the guide for you. As a note, only get Sorcerer's Shoes if they have almost no magic damage/cc on their team. At all other times, go mercs.

There is a place between dimensions, between worlds. To some it is known as the Outside, to others it is the Unknown. To those that truly know, however, it is called the Void. Despite its name, the Void is not an empty place, but rather the home of unspeakable things - horrors not meant for minds of men. Cho'Gath is a creature born of the Void, a thing whose true nature is so awful most will not speak its name. Its fellows have been poking at the walls that divide dimensions for a crack, a way into Runeterra, where they can visit their own personal paradise of horror upon the world. They are called the Voidborn, creatures so ancient and terrible that they have been removed from history altogether. It is rumored that the Voidborn command vast armies of unspeakable creatures on other worlds, that they were once driven from Runeterra by powerful magic lost to antiquity.

If such tales are true, then the rumors that follow must be equally true - that one day, the Voidborn will return. Even now, something dark stirs in Icathia, perverting the summoning rituals of the League to allow the presence of Cho'Gath. It is an alien creature of malice and violence, a thing that causes all but the most stalwart to cringe in fear. Cho'Gath even appears to feed on its predations, growing and swelling as it gorges itself. Worse yet, the creature is intelligent, perhaps greatly so, making most wonder how such a monster could be contained. Fortunately, the power of the League's summoning has confined Cho'Gath's presence exclusively to the League of Legends. It is here that summoners use Cho'Gath's Voidborn abilities to help decide the fate of Runeterra. The Terror of the Void knows what fate it would choose for Runeterra, given half the chance.

Woe betide the day when Cho'Gath grows weary of the League.

There exists a realm where mere mortals don't walk, where the buses don't run, and where there's a gas station offer $1.49 a gallon. That place is the residence of the main topic of this guide, Cho'Gath.

In a time long forgotton, Mr. Gath was a family man. He spent his days working, hunting to feed his kin, when one day, all of that changed. An unknown force swept across the land Cho'Gath called his home, however, Cho was away at the time, building a tree house to jump down from and eat people. As he put the finishing touches on the tree house, he heard the immistakable cry of a baby Cho'Gath in pain "DADDY!" the voice cried. Cho rushed home, but it was too late. The kin he had fathered for so long were no longer sitting on the couch or in their bedrooms, they were smeared across the wallpaper. Horrified, scared, and angry, Cho'Gath looked behind them and saw a message on the wall, written in blood; "Sorry Cho'Gath, nothing personal, just business. Find a place called Runeterra. Join the League of Legends, all your questions will be answered."

Cho'Gath screaming and shouting, flew out of his house and yelled so loud he broke logic, and created a door into Runeterra. Tramping everything in his path, he finally made it to the League. He bashed down the door and proceeded to eat several beggars. The crowd cheered. Then, he went to the sign up desk and ate Jarvin's favorite desk. "You must be Cho'Gath", said Jarvin. "I'm Jarvin, the prince of Demacia. I assume you're here about those bloodstains on your wall, no?" "Whoever did that to my kin will know the true meaning of fear" growled the beast. "Oh well, funny story actually. We didn't realize you could speak English, but we wanted you in the League. Our friend Garen here came up with this plan, and we knew it would get your attention. Don't worry, your children and wife are safe in that house made out of meat over there. So will you stay and fight?" Cho'Gath paused, growled, then laughed for about 20 minutes before eating Jarvin's second favorite desk. "Well than, guess we have a deal. Come along Gar-...Garen? Where are you?" Then Garen jumped out of a nearby shrubbery screaming "DEMACIA!" and tried to attack Cho'Gath. Garen is now using his second favorite prosthetic arm now for obvious reasons.
-Snoody

Pros:
Great sustain
Tons of damage while building rather tanky
Becomes absolutely massive, making him a great tank
Pretty solid poke/farm abilities.
Can wear a top hat (The best pro)

Cons:
Can be easily poked
If Q is missed, you're screwed.
Only escape is his Q
Top hat costs 1850 RP.

Cho'Gath's abilities in a shellnut.

Carnivore(passive)
This passive grants health and mana (albeit, a very small amount) on a minion/champion kill. This amount scales (not by much) per level. This is what gives Cho'Gath his sustain, because this coupled with Vorpal Spikes (see below) allows you tons of sustain.

Rupture (Q)
This ability creates a small field for about 1/2 a second before dealing damage and launching foes standing on it up into the air (this interrupts things such at Katarina's ultiment) as well as slowing them for a little while after they land. Very useful in case you're being chased, just gotta learn how to time it. It's also the poke I was referring to earlier. At later levels, it hits surprisingly hard.

Feral Scream (W)
This abilily creates a cone in front of Cho'Gath (After what I assume to be 0.01 second cast time) that silences and damages all enemies in front of him. Useless for the damage portion (except as a very very weak finisher), but the silence is extremely useful in team fights in order to grind the enemy team's rotations to halt. Not to be used to much in laning, for the mana cost early game doesn't make up for the damage dealt.

Vorpal Spikes (E (Toggle))
This ability makes Cho'Gath's auto attacks deal additional magic damage to all enemies in front of him in the form of spikes, thus allowing his auto attacks to hit extra hard, as well as deal both AP and AD. The only time I would recommend toggling it off is when attacking a tower that has an enemy underneath it, as your spikes would hit him/her and pull turret aggro. However, at all other times keep it on, for there's no mana cost and it's essentially free damage. As a note, due to a somewhat recent patch, the spikes scale with Cho'Gath's sizing, causing them to deal more damage the larger he gets. How does he get larger? Read on!

Feast (R)
Cho'Gath's ultimate the pièce de résistance in my opinion. This ability deals a metric rectum-ton of true damage (to minions, 1000 (+.66 AP), while still being an effective finisher to enemy champions). Now, here's his shtick, if you finish off a minion/neutral mob or champion with it, you grow larger (told you) and gain bonus health. This effect can stack up to six times, and you lose half of your stacks upon death (so stay safe!). At level 16, at six stacks, you gain a whopping 920 health! Now you can see why I named the guide that.

There are several places that would say Cho'Gath Jungle is a good idea, and while I would say, "Yes, it's viable," so is Karthus jungle because of his E's mana regain. You could also jungle Oriana if you felt the need, but really, why would you?

Cho'Gath excells in top lane, and arguably mid. Top lane because of his good sustain and escape mechanics, and mid lane because he's technically an AP (who gets tanky, a solid counter for AP Mids) so the choice is yours. I would personally recommend top, but mid is also quite good. Jungle? Ehhhhhh if you really wanna.