Easy "Level-Headed" trophy:
Complete the game, then play the last chapter and go directly to the Boss battle. If you defeat the boss without using hysteria, you will earn the trophy.
Only use the Blunderbuss when there are three or four attackers in the vicinity. It drains all of Alice's will, but the meta-essence of several dead opponents will restore it.
Demon Dice hint:
The Demon Dice are a great choice when Alice faces several enemies at once. However, when the number of enemies gets down to one, the Demon Dice will turn on you. Just throw a couple knives into the fiend that the Demon Dice unleashes.
Only grab the Ragebox when there are enemies around. It only lasts a specific amount of time and you will not get as many kills as possible for the duration.
New Game + mode:
Complete the game to unlock New Game + mode. In this mode, you can start a new game and keep your Roses and Weapons from the previous game.
Unlock the following dresses to gain their effects by completing the corresponding chapters:
DRESS - EFFECT - CHAPTER
Steamdress: Hatter's Domain - When equipped breakables drop more teeth and roses. - Chapter 1
Siren: Deluded Depths - When equipped your enemies drop twice as many roses. - Chapter 2
Silk Maiden: Oriental Grove - When equipped your enemies drop twice as many teeth. - Chapter 3
Royal Suit: Queensland - When equipped your health is limited to four roses total. - Chapter 4
Misstitched: The Dollhouse - When equipped your Shrink Sense duration is doubled (Chapter 5
Classic: Infernal Train - When equipped you will regain health when shrunk - Chapter 6
Psychonauts easter egg:
In Chapter 4, after doing the first chess puzzle, you will be chased
into a hole by the giant unbeatable card monster. When you first arrive
down there, go a short distance ahead and look at the right wall to find
a heart stone. Shrink down to discover that it is a fake rock. Run into
the keyhole tunnel and on the other side will be a floor where you can
use a bomb to break. Do so, then go down the stairs to get a memory and
extra teeth. Notice the skeleton sitting on the chair--it is Raz from
Psychonauts. He can be identified by the red goggles, his shape, and the
position that he is in (which is the stance he uses for a mind attack).
It kind of looks like Raz is dead, perhaps signaling that there'll be
no Psychonauts 2.
"Level-Headed" trophy hint:
After completing the game, select the final chapter and go directly to the Boss battle. Defeat the boss without using hysteria to unlock the trophy.
The Strong Survive - Complete the Game on Easy Difficulty.
The Imaginative Endure - Complete the Game on Normal Difficulty.
The Beginning of the End - Complete Chapter 1 on Nightmare Difficulty.
Strike a Deal - Upgrade a Weapon.
More than a Mouthful - Fully upgrade a weapon.
Shooting the Moon - Collect 4 Jars of Rose Paint.
Family Memories Fond and Faded - Find all Liddell Memories.
Nothing Like the Smell of Bacon - Pepper All Snouts in a Chapter.
Dress-Ups - Equip a Different Domain Dress.
Weapon Schizo - Hobby Horse to Vorpal Blade to Hobby Horse Combo.
Grind 'em All! - Kill 5 Botterflies in a row with the Pepper Grinder.
Neighslayer - Hit 4 enemies with a single Hobby Horse ground smash.
Tea Party - Destroy 10 Ruin Barriers.
Eyes on the Size - Find the hidden Shrink Sense Decal.
Brollyant - Kill 10 Bitch Babies with Deflection.
Beware of the Lagomorph - Kill 30 enemies with the Clockwork Bomb.
No quarter! No mercy! - Defeat 100 Ruin Enemies..
52-Pick-Up - Defeat 52 Card Guards.
No Happy Returns - Back to Wonderland.
End of Innocence - Complete Vale of Tears.
Hatter's Demise - Complete Wonderland Chapter 1.
Grim Folly - Complete Wonderland Chapter 2.
When Worlds Collide - Complete Wonderland Chapter 3.
The Harder they Fall - Complete Wonderland Chapter 4 .
The End of Daze - Complete Wonderland Chapter 5.
Snicker-snack! - Acquire the Vorpal Blade.
Ground Pork - Acquire the Pepper Grinder.
Strange Hobby - Acquire the Hobby Horse.
Death by Darjeeling - Acquire the Teapot Cannon.
Venting Frustration - Spend 7 minutes on steam vents.
The Persistent Flourish - Complete the Game on Hard Difficulty.
Armed to the Teeth - Fully upgrade all weapons.
Painting the Town Red - Complete all Radula Rooms.
Everything Fit to Remember - Find all Memories.
Seasoned Campaigner - Pepper All Snouts in the Game.
Ship of Fools - Complete HMS Gryphon without taking Damage.
Just Peachy - Collect all the Peaches in the Scroll of Destiny.
Grandmaster - Complete a Chess Puzzle without failing.
That's Using Your Head - Complete Off With Her Head Part 2 in under 6 minutes.
Cold Arms, Cold Heart - Defeat the Drowned Sailor without taking any damage.
Pulling His Strings - Defeat the Dollmaker without taking any damage..
Calm In the Face of Death - While on your last Rose, kill 5 Enemies without activating Hysteria.
Madness Prevails - Complete the Game on Nightmare Difficulty.
Level-Headed - Finish the game using Hysteria only once.
Platinum For All Other Trophies - Earn all Bronze, Silver, and Gold trophies.
"American McGee's Alice" trophies:
Madness Begins - In American McGee's Alice, Complete Village of the Doomed.
Additionally there are five secret trophies.
Skool-Leaver - In American McGee's Alice, Complete Fortress of Doors.
Out of the Woods - In American McGee's Alice, Complete Wonderland Woods.
Dead Hatter - In American McGee's Alice, Complete Behind the Looking Glass.
Royal Approach - In American McGee's Alice, Complete Queen of Heartsland.
Full Recovery - Complete American McGee's Alice.