When in the area on the way to the mockturtle there is a Hobby Horse ice patch that appears to be unbreakable. You cannot break it from the "top". Go back outside before going to the Bottled Ship. Notice that there is a small pond of water that goes into the ice on the cliff at the bottom (where a spring mushroom is located). Use your Shrink Sense to find an invisible platform that will begin moving into the ice and allows access to a secret area. To exit the area use the other spring mushroom to catapult yourself through the unbreakable hobby horse ice patch.
Chapter 3: Getting past the cave
After entering the cave, you will go down some steps. There will be a platform to the left with two vases. Walk up to the painting on the left side and interact with it. This will take you into the next area of the chapter.
Chapter 4: Entrance to Red Queen's area
Run over to the switch that triggers the platform and leave a Clockwork Bunny there. Then, sprint to the other switch and get the door open. Note: Trigger it before the real attempt to avoid the intermission sequence using up time. Next, sprint to the middle area to the invisible platforms. Shrink momentarily to see where to go. From here, jump off the platform as soon as possible to the invisible beam above it. Next, sprint to the door. Note: You may need to shrink under it to get in.
Chapter 4: Pig Snouts
At some point you will be able to hear Pig Snouts but not see them. You must use your Shrink Vision to be able to find them.
Chapter 5: Defeating Colossal Ruin
Get on the opposite platform from the Ruin. This is to have a gap between the two platforms separating you and the Ruin. The Ruin will not try to cross the bridge. The gap will prevent it from charging you. Fire the Pepper Grinder at the doll heads that stick out of its body. Throw clockwork bombs to distract that Insidious Ruin that appear during the battle. When the Colossal Ruin loses all the doll heads and starts to charge you with its flame attack, abandon the gap and face it normally. Use the Teapot Cannon on the giant doll head that appears and attack him as usual. If you try to knock him down and stun him with the gap between you, an invisible wall will prevent you from hitting.
Defeating Cannon Crabs
Drop a Clockwork Bomb near the crab, then detonate it to flip the crab on its back. Use a weapon to damage the crab once or twice. After two or three rounds of doing this, the crab will lose its cannon and can be flipped using either the same method or hit with the ground smash from the Hobby Horse. Repeat the process until it has been defeated.
Use the Hobby Horse and keep hitting the crab. Then, use your Vorpal Blade once the crab is knocked onto its back. You can also try using the Tea Cannon against the crab.
To kill the Cannon Crab in the mini-game, just drop an exploding barrel on it or shoot a cannonball at a nearby explosive to blow up the crab.
Use the umbrella to knock the cannon back at the crab. Then, attack the crab while it is on its back until its arm is ripped off. Then use the Hobby Horse and one more Vorpal Blade attack to kill it.
Throw a Bunny Bomb at the Cannon Crab and set it off. This will flip the crab on its back. You can now attack its underside with any weapon. Be careful, as the crab will get back up fairly quickly. Once you have hit it a few times, be ready to dodge or throw another bomb.
Defeating Madcap with shield
Notice there is a slight pause before it attacks. Evade the attack, then attack it with your knife.
Run up to the Madcap and immediately dodge. This triggers the enemy to attack, and you will have already dodged it. Once his fork is stuck in the ground, run up and hack away.
The Hobby Horse works well, as it breaks enemy shields. Use it against the Madcap with the shield, Cannon Crab, and other similar enemies.
Defeating the Card Executioner
When in the queen's castle, after defeating the Card Guards the Card Executioner will appear. After hitting him several times, keep dodging his attack. Eventually Alice will say that she cannot fight him and a door will open. You can find the door at the north end of the room.
Defeating the Eyepot
When facing the Eyepot in the Hatter's Domain, shoot it with your Pepper Grinder until it falls to the ground. Then, run up and slash him until he begins to stand back up. When he opens his eye, start the process again. He should be defeated after two or three times.
Defeating the Menacing Ruin
You are given an umbrella for use to defeat a Menacing Ruin. Lock on the Menacing Ruin. One of the Menacing Ruin's attacks is to throw a ball of fire. You may need to move around the Ruin to see this attack move. When it does the move, it will reach behind its back, pull out a ball of fire, and hold it before throwing it at you. When this happens, move back from the Ruin and open the umbrella as it throws the ball of fire at Alice. With the proper timing, the ball will rebound off the umbrella and hit the Ruin, breaking its arms and its ability to defend itself.
Dodging
The dodge move is directional and can be controlled. Hold Left, Right, Forward, or Away to dodge in that direction while locked on the enemy. This is an important tactic when fighting enemies such as the armored card guards who can only be damaged from behind after they attack you.
Dresses
Complete the indicated chapter to unlock the corresponding dress.
Dress
How to unlock
Classic
Infernal Train (Chapter 6). When equipped you will regain health when shrunk.
Misstitched
The Dollhouse (Chapter 5). When equipped your Shrink Sense duration is doubled.
Royal Suit
Queensland (Chapter 4). When equipped your health is limited to four roses total.
Silk Maiden
Oriental Grove (Chapter 3). When equipped your enemies drop twice as many teeth.
Siren
Deluded Depths (Chapter 2). When equipped your enemies drop twice as many roses.
Steamdress
Hatter's Domain (Chapter 1). When equipped breakables drop more teeth and roses.
Easy "Level-Headed" achievement
Successfully complete the game, then select the final chapter, and go directly to the Boss battle. Defeat the Boss without using Hysteria to get the "Level-Headed" achievement.
Kill Or Be Killed challenge
Upgrade the Pepper Gun in order to kill the babies and Eyepots from a distance. Use the umbrella to block the tea attacks and knock the big enemy's charges back at him. You can now attack, dodge and repeat the process until he has been defeated. This will require some time.
Take out the Eyepots first. Lock on, get close, and when they are about to stomp, teleport backward and shoot them with the Pepper Gun. Teleport back in and slice them up while they are stunned. Repeat the process as needed. The Menacing Ruins can be defeated by knocking their fireballs back at them, then keep attacking at close range with the Vorpal Blade, teleporting in and out and side to side to avoid attacks.
New Game+
Successfully complete the game. You can now start a second playthrough with your previously upgraded weapons and clothes.
Psychonauts reference
In Chapter 4, just after you do the first chess puzzle, you will get chased into a hole by the giant unbeatable card monster. When you first get down there, go a short distance ahead, and look at the right wall to find a heart stone. Shrink down to learn that it is a fake rock. Run into the keyhole tunnel. On the other side is a floor where you can use a bomb to break it. Do so, then go down the stairs to get a memory and some extra teeth. There is also a skeleton sitting on a chair. It is Raz from Psychonauts. He can be identified by the red goggles, his shape, and the position he is in (which is the stance he uses for a mind attack). With this in mind, it looks like Raz is dead, and there will be no Psychonauts 2.
Secret Achievements
Achievement
How to unlock
Armed to the Teeth ( 30 points )
Fully upgrade all weapons.
Death by Darjeeling ( 10 points )
Acquire the Teapot Cannon.
End of Innocence ( 10 points )
Complete Vale of Tears.
Grim Folly ( 10 points )
Complete Wonderland Chapter 2.
Ground Pork ( 10 points )
Acquire the Pepper Grinder.
Hatter's Demise ( 10 points )
Complete Wonderland Chapter 1.
More than a Mouthful ( 20 points )
Fully upgrade a weapon.
Neighslayer ( 10 points )
Hit 4 Enemies With a Single Hobby Horse Ground Smash.
No Happy Returns ( 10 points )
Back to Wonderland.
Snicker-snack! ( 10 points )
Acquire the Vorpal Blade.
Strange Hobby ( 10 points )
Acquire the Hobby Horse.
Strike a Deal ( 10 points )
Upgrade a Weapon.
The Harder They Fall ( 10 points )
Complete Wonderland Chapter 4.
When Worlds Collide ( 10 points )
Complete Wonderland Chapter 3.
Troubling Visions
Collect all the bottles for a chapter to unlock the "Troubling Visions" (concept art) entry for it in the "Extra Content" menu.
Upgrading weapons
Select the "Weapons" option at the menu. A certain amount of teeth are required to upgrade weapons. Select the weapon to be upgraded and an the option to upgrade it will appear if you have enough teeth collected. It is recommended that the Vorpal Blade be upgraded to level 4 before any other weapon. It is your main weapon, and you will use it most frequently. All the other weapons work fine at their lower level for their specific purpose, such as hitting Eyepots, etc.
Various Achievements
Unlock Xbox Live Gamerscore points, by completing the following Achievements.
Achievement
How to unlock
52 Pick-Up ( 20 points )
Defeat 52 Card Guards.
Beware of the Lagomorph ( 20 points )
Kill 30 enemies with the Clockwork Bomb.
Brollyant ( 20 points )
Kill 10 Bitch Babies with Deflection.
Calm In the Face of Death ( 30 points )
While on your last Rose, kill 5 Enemies without activating Hysteria.
Cold Arms, Cold Heart ( 30 points )
Defeat the Drowned Sailor without taking any damage.
Dead Hatter ( 10 points )
In American McGee's Alice, Complete Behind the Looking Glass.
Dress-Ups ( 10 points )
Equip a Different Domain Dress .
Everything fit to remember ( 30 points )
Find all Memories.
Eyes on the Size ( 10 points )
Find the hidden Shrink Sense Decal.
Family memories fond and faded ( 10 points )
Find all Liddell Memories.
Full Recovery ( 50 points )
In American McGee's Alice, Complete the Game.
Grandmaster ( 10 points )
Complete a Chess Puzzle without failing.
Grind 'em All! ( 10 points )
Kill 5 Bolterflies in a row with the Pepper Grinder.
Just peachy ( 20 points )
Collect all Peaches in the Scroll of Destiny.
Level-Headed ( 50 points )
Finish the game using Hysteria only once.
Madness Begins ( 10 points )
In American McGee's Alice, Complete Village of the Doomed.
Madness Prevails ( 80 points )
Complete the Game on Nightmare Difficulty.
No quarter! No mercy! ( 20 points )
Defeat 100 Ruin Enemies.
Nothing Like the Smell of Bacon ( 10 points )
Pepper All Snouts in a Chapter.
Out of the Woods ( 10 points )
In American McGee's Alice, Complete Wonderland Woods.
Painting the Town Red ( 30 points )
Complete all Radula Rooms.
Pulling Strings ( 30 points )
Defeat the Dollmaker without taking any damage..
Royal Approach ( 10 points )
In American McGee's Alice, Complete Queen of Heartsland.
Seasoned Campaigner ( 30 points )
Pepper All Snouts in the Game.
Ship of Fools ( 20 points )
Complete HMS Gryphon without taking Damage.
Shooting the Moon ( 10 points )
Collect 4 Jars of Rose Paint.
Skool-Leaver ( 10 points )
In American McGee's Alice, Complete Fortress of Doors.
Tea Party ( 10 points )
Destroy 10 Ruin Barriers.
That's Using Your Head ( 20 points )
Complete Off With Her Head Part 2 in under 6 minutes.
The Beginning of the End ( 20 points )
Complete Chapter 1 on Nightmare Difficulty.
The End of Daze ( 10 points )
Complete Wonderland Chapter 5.
The Imaginative Endure ( 50 points )
Complete the Game on Normal Difficulty.
The Persistent Flourish ( 75 points )
Complete the Game on Hard Difficulty.
The Strong Survive ( 25 points )
Complete the Game on Easy Difficulty.
Venting frustration ( 10 points )
Spend 7 minutes on steam vents.
Weapon Schizo ( 10 points )
Hobby Horse to Vorpal Blade to Hobby Horse Combo.
Various unlockable dresses
Dresses are unlocked after every Chapter you played.