Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Before I get into explaining ANYTHING about this build, it requires that you are not a noob while playing Cho'Gath. His skills, which this build is heavily reliant upon, cost a good bit of MP for him and have rather lengthy cool-downs.
Cho'Gath The Vengeance of the Void
When you first start out you want to purchase a Regrowth Pendant to allow you to keep your lane longer without having to run back and forth to base. This is also a needed item for the staple of any good tank; Warmog's Armour. Just grab Rupture and take out the minions until you can grab Feral Scream. If you manage to lure the enemies far enough away from their turret you can easily kill them with Rupture and then Ignite, which deals great damage at these low levels.
Once you have enough gold pick up Warmog's Armour and kill some mobs to get an easy rise on your HP. Use Feast as soon as you can; it's well worth it. By the time you get Feast (if you were fed, it'll be much sooner than even mid game) you should be able to push past their first turret. Take it out and keep on marching.
If your Leviathan got stacked early on, you're unkillable at this point in time (end game). You can solo turrets even without mobs, and even those pesky nukes can't solo you (Veigar can really hurt you, but if you get first strike with Feral Scream it's already over for him). Even big ganks will have problems as long as you keep those skills going (I scored two aces back to back without healing once).
Even if you don't do to hot early on, come end game, once you get all your gear, you'll be feared. Able to even push back a full assault on your nexus enemies will normally run when they see you coming. Able to hit for well over 3k in just a few moments with a silence and a semi-stun (airbourn) there really isn't much chance for somebody to escape or fight back. If they manage to silence you first, your normal attacks hit for nearly 300 per hit once you get stacked and you can take more abuse than most people dream of giving out. A few nukes will have the possibility of taking you out with a gank, but if you can kill one and silence the other one they will go running away like a smart squishy.
Just don't play stupid and let your HP drop to far; if you loose your stacks you're much easier to kill.
This is my first build, and I'll gladly make any changes if you prove your point. I'm generally a pretty easy-going guy, and I just want to make the best Cho'Gath people will see so any advice is welcome.
Before you +1 or -1 please tell me why. Thank you.
08/25/2010 - Modified items to increase overall DPS and counterbalance HP loss with armour gain.