World of Goo/Chapter 1: The Goo Filled Hills

Going Up "Easy as Goo Pie"

 * Goal: 4 goos
 * OCD: Collect 11 or more goos.
 * Goo Types: Black

The pipe is located directly above the starting structure. All you have to do is build a tower to reach the pipe and the remaining goos will be sucked in.

In order to get the OCD, you must only use three goos to complete the tower. Just make sure to place each goo as high as you can so that the third goo can be pulled in by the suction of the pipe. To tell if you are placing the goo high enough, the white guideline should be either entirely or almost invisible; place the good right at the border.

Small Divide "Easier than it Looks"

 * Goal: 8 goos
 * OCD: Collect 16 or more goos.
 * Goo Types: Black

The pipe is located on the opposite side of a ravine with sleeping goos directly underneath it. In order to reach the pipe, you must build a bridge across the chasm. Unfortunately, because your structure isn't completely rigid, the bridge will begin to sag as you build it. You may have to build up a bit if the bridge sags too much.

When you reach the other side of the ravine, the sleeping goos will wake up. Use the goos you have remaining to build up to the pipe, making sure that you have at least 8 goos to complete the level.

Hang Low "Wake the Sleeping Goos"

 * Goal: 8 goos
 * OCD: Collect 22 or more goos.
 * Goo Types: Albino

The pipe is located above the structure and a bunch of sleeping goos are located at the bottom of the stage. The first step is to build a ladder down to the sleeping goos. Once they have been woken up, build a tower on the top of the structure to reach the pipe.

Impale Sticky "If You Get in Trouble, Just Go Back in Time"

 * Goal: 26 goos
 * OCD: Collect 42 or more goos.
 * Goo Types: Black

The pipe is located on the top of the stage. You must build a structure that loops around a corner and avoids a spinning cog. Further, if you build too far out to the left, the weight of the structure will cause it to break. To begin, build the structure to the right for some counterweight to support the structure. Then begin to build out to the left making sure to steer clear of the spinning cog. Remember that the goos moving around on the structure will causes it to wobble, so you need plenty of room between the structure and cog. Build around the corner to reach the pipe.

Ivy Towers "Brace Yourself"

 * Goal: 2 goos
 * OCD: Collect 16 or more goos.
 * Goo Types: Ivy

Gradually work your way to the top - reach up as far as you can with the ivy goos, trying to follow the pattern for the tower you are building. When you run out of available goos, tear ones from the far bottom and place them on top.

To get OCD, reach the suction without any mobile goos. Once there, sever the top two goos from the rest of the structure, to give a dangling mini-tower. Disassemble the lower tower, sending the goos one-by-one to the suction. Finally, pull the lower goo away to pull the 16th goo into the collection.

Tumbler "Keep Growing"

 * Goal: 8 goos
 * OCD: Collect 35 or more goos.
 * Goo Types: Green

Since the room keeps turning around, you will have to expand your tower in all directions. As it grows, it will eventually become large for the room and reach the top.

To get OCD, build the tower "inefficiently" to reach the suction without any mobile goos. Once there, sever the top two goos from the rest of the structure, to give a dangling mini-tower. Disassemble the lower tower, sending the goos one-by-one to the suction. Finally, pull the lower goo away to pull the 35th goo into the collection.

Chain "Balance"

 * Goal: 15 goos
 * OCD: Collect 25 or more goos.
 * Goo Types: Ivy, Common

Use the ivy goos to reach the common goos sleeping at the bottom, then use the ivy goos to reach the top.

To get OCD, use the ivy goos to weigh down one side of the chain. Then, gradually build the ivy tower to the top, placing a common black goo at the top. Sever the top and bring the goos to the exit one-by-one. The last goo involves breaking the top.

Flying Machine "Some Balls are Lighter than Other Balls"

 * Goal: 4 goos
 * OCD: Complete level in 16 seconds or less.
 * Goo Types: Balloon, Black

Use the baloons to raise the gates, then attach the balloons to the tower.

Fisty's Bog "Not Too High, Not Too Low"

 * Goal: 6 goos
 * OCD: Complete level in 14 moves or less.
 * Goo Types: Balloon, Black

Tower of Goo "Higher and Higher"

 * Goal: 25 goos
 * OCD: Collect 65 or more goos.
 * Goo Types: Black

Ode to the Bridge Builder "It Looks Harder than it is"

 * Goal: 8 goos
 * OCD: Collect 38 or more goos.
 * Goo Types: Black

Regurgitation Pumping Station "It's a Secret"

 * Goal: Make it to the top
 * OCD: Complete level in 42 moves or less.
 * Goo Types: Ivy

You first need to brace your structure against the sides of the stomach, to prevent chaotic motions from knocking the tower down, then build upward. Go up cautiously, as it's easy for the tower to topple to the side. Avoid the gears on the left and right and go straight up through the small gap. When you build far enough into the throat, your tower should be forced up, and some goos may be left behind in the stomach.

The remaining task is to attach the giant eyes to your structure. These eyes will act as balloons, and will carry your tower into the sky.