When you get trapped in the room and the green gas floats in, use your glove to tip the
statue back. When in that room, you will find the cat. You can drive it around.

When you fight the giant eye monster (Princess), run right up against the well and shoot.
You should not be able to get hit. Additionally, Princess can easily be defeated with the
Harpoon weapon. Just wait for the beast to open its mouth and fire away, aiming for the
metal container in said mouth. Three harpoon shots on target and Princess will belong to
the past.

Successfully complete the Amateur League with golds to unlock Dr. Peabody.

When walking into the room where Cortez or Tipper says "Did I miss the party?", there is a
slot machine. Walk over to it and press A to play slots. Press the buttons under "Hold" to
hold that slot.

Successfully complete the Behind The Undead challenge (the first one) with bronze, silver,
or gold to unlock the Zombie Monkey.

In the area just after the electric zombies, you will see a few rooms with a glass cage by
them. On the nearby computer, you can have the subject inside the cage undergo
electricity, incineration, shrinking, zombifying, stretching, cranium-expanding, and
thinning. If you power up the stretching or cranium-expanding too much, the subject will
explode. There are two computers in single player and one computer in co-op mode.

These are the huge robots on the Machine Wars and Something to Crow About levels. When you
see these robots, charge them until you run into their chest. When you are this close they
cannot shoot you because their arms are too long. Then, shoot them in the head or, if you
want to save ammo, punch them to death.

If one character under control moves too far ahead of the other one, the one who was left
behind will "teleport" a few feet ahead of the first character, often resulting in strange
camera angles.

When you are at Crow's computer, when you activate the countdown/self-destruct sequence,
the monitor will display the message "You didn't say the magic word" and will have a
little guy laughing and shaking his finger.

Successfully complete story mode on the normal or hard difficulty setting to unlock
Corporal Hart.

Note: This may or may not work with any other character besides Berserker Splitter.
Go to Mapmaker and set up a Berserker Splitter with a key. When it does its camouflage
cloaking and reappearing, it will accidentally drop the key. It is possible the game does
not treat the cloaked Splitter as a solid character and causes the key to fall.

Enter the prison cell on the other side. Create a line of vertical holes on the metal drum
starting from the top. This results in a large pool of gasoline. Shoot the lantern that
hangs from the ceiling to blow it up.

In the factory where the TimeSplitters are being incubated, the giant energy sphere
powering their growth can be taken out on the top level by flicking both the switches on
either side of the ball. This will lower its defense. Then, take the lift down to the
floor below and throw a plasma grenade (found next to the lift) at it, causing it to
explode.

In Crow's Palace in the Something To Crow About level, after crossing the bridge you
activate using the electrotool, open the big doors. An intermission sequence begins. Wait
for the unmoving (but laughing) Crow to move. As soon as he takes his first step in the
intermission sequence, press A to jump into the action. As soon as you press A, fire at
Splitter Crow for a few seconds. He will die without fighting. This is because when you
skipped the intermission sequence, Crow had no health; by shooting him when he has no
health he dies immediately.

On the level were you kill "Princess", the contraption that Jo-Beth is on is the fire cage
from Indiana Jones And The Temple Of Doom.

Go to any ramp and stay out of the tank's sight. Use the Telekinetic Glove to take the
ammunition when it spawns and attack the tank with rockets.

Get a bronze or better on the Rare -Or Well Done challenge on Behead The Undead to unlock
Carrion Carcass.