Super Mario Galaxy Game Guide/Walkthrough
Gate Observatory
Gateway Galaxy
Getting through the Engine Room will let you open up two new observatories. The Gate observatory is the same world you woke up on after the events with Princess Peach at the beginning of the game. Head inside and speak to Rosalina atop the castle tower. If you do so, you'll earn a new ability: the Flight Mario suit. Use it to collect all 100 purple coins on the planet, and then nab the Power Star here. After you're done with that, you'll be able to speak to the Red Luma atop the library in the main Comet Observatory to let you fly around.
Garden Observatory
Deep Dark Galaxy
The Underground Ghost Ship
There are actually three 1-Ups on the beach here: one is atop the Shroom ship, one is in the green crab, and one is in the chest in the water; use the shell to pop it open. When you've got them, use the cannon here. You can hit either of the main planets in the sky to gain a Fire Suit and lower the gate here; the wooden planet offers you the chance to load up on star bits if you get the Rainbow Suit, while the green planet will let you net a load of gold coins.
Use the fire suit to set the torches by the gate on fire and raise it. Dive into the water and head down. Follow the arrow of star bits to reach a switch; flip it, then head to the top of the water tube and flip the second switch between the octopi to move on.
When you reach the Ghost Ship, lure the Boos into the light shaft, then somersault up the cliffside near it to find a Life Mushroom shield.
When you reach the deck of the ship, a large Magikoopa will appear. You'll need to repeat your actions from before, when last you saw her: wait for the green shells to shoot at you, pick them up, then throw them at her when she's standing still. If you can't hit her from the ground, jump a bit and try to throw while jumping. She'll make you jump through some hoops, but you'll get her down eventually.
Bubble Blastoff
The cannon here at the beginning of the level has been hijacked by a mole. Get close to him, somersault on top, and ground pound three times to defeat him. With that done, return to one of the planets in the sky and grab another Fire Suit. Return to the gate and light all three torches here to reveal an Ice Suit. Use that to cross the lake nearby and jump upwards on top of the sprinklers to reach the upper level here.
When you grab the large coin here, you'll be shot up to a green ledge. Somersault up to the nearest water spout and walk past the stone spikes and through the Magikoopas to find a pipe with some goodies. With that explored, use the bubble blasters to shoot you over the moving blocks and upwards. Eventually you'll find a bubble blaster near a ring of fire that will shoot you off to a planetoid.
When you pound the three stumps here into the ground, another blaster will appear. Ride its bubble to another planet with electrical rings around it. When the tennis balls that roll around inside the sphere are directly underneath you, ground pound them into the watermelon in the middle of the sphere to blow it up and reveal the Power Star.
Guppy And The Underground Lake
Head down to Guppy in the lake inside the cave here to meet up with him. Complete his track of eight rings again for the final Power Star here.
Dreadnought Galaxy
Infiltrating The Dreadnought
Avoid the electrical fields in the first planet here, then launch you way to a tube enclosing a pipe. Kill the enemies to raise the pipe and move on. When you reach the interior of the dreadnought, start making your way to the right. When you find the gravity switch, flip it and wall run up past the smashers before they get you.
Move past the gravity switches into the pipe, then start climbing the exterior portion of the Nought by jumping on the springed spinners. When you reach the top, walljump up to the next launch star and move on.
The last planet here has a water fountain in a cage; lure a Bullet Bill over to destroy it and flood the planet. With that done, you can start hopping around up top and avoid the electrical beams to reach the Power Star.
Dreadnought's Colossal Cannons
Drop down to grab the 1-Up here, then return to the bolts and stand on their right side to start them turning. You'll have to run towards the left while remaining on the right side to get to the end of the next platform, or you can just turn them a bit and then longjump to the far side. The pressure plates near the rolling Chomps all need to be switched to move on.
When you get past the next screws, you'll launch yourself to the exterior of the Dreadnaught. There isn't really much to say about this section, save that it's pretty difficult to get past. It's difficult in the sense that the timing of the jumps is annoying, sure, but it's also difficult because the game changes the ways in which you move when the gravity shifts. It's annoying, but if you get to the end you'll net another Power Star.
Revenge of the Topman Tribe
After moving upward, spin the two Topmen into the electrical lines at the top of the planetoid to drop the electricity. You can also somersault+spin to reach the 1-Up here. The next satellite has a groundpound switch; hit it to recreate a pull star and launch onward.
There's a hidden Life Mushroom under the rocket from which you need to hit all of the pull stars. Use it before making your way to the launch star. The next plane you land on will have a Koopa wandering around near where you begin; use him to unlock the chest before the launch star to get a 1-Up.
Topmaniac at the end of the level is pretty much identical to the one you fought before: knock him on the head, spin him into the electricity, and he'll go down pretty quickly.
Matter Splatter Galaxy
Watch Your Step
Heh. This isn't difficult to describe; it's difficult to do. The ground here is unstable; there are large pockets of dark matter that can cause you to fall to your death. And, indeed, the process of getting the star here will involve dying a few times as you trial-and-error your way through it. Maybe you'll get it in one life, but otherwise you'll have to die your way to each progressive checkpoint and learn the level to get your Power Star.
Table of Contents
Walkthrough
Obscure Stars
Star Checklist
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