Rolling

When Crouching, hit the a button to roll. This also helps in dodging bullets.

Hidden Pouches

There are 4 hidden ammo pouches in the game. Each pouch lets you carry one extra magazine and one extra box of shotgun shells (only).

1: On the first level, go straight and take a right. Keep going straight until you 
see a green truck and a guy on top of a building to the left of the truck. Go through 
the door in the building and you should see the first pouch to your left on a crate.

2: On the second level, follow the path until you come across another green truck 
(you should see a guy running ou of the back of it). Under the truck (look 
carefully) is a destructible crate. Destroy it and an indestructable crate should 
fall in its place. Go up the ramp (where you saw the enemy running from earlier) 
and inside the truck is the second ammopouch.

3: On level 23, go straight until you rach a ladder. Go up the ladder, across to the 
other ladder and go down. Turn to your left, keep going straight until you are at 
the very end wall (be sure to kill guys as neccessary). To your right go straight. 
You will see 3 magazines on 2 crates. Turn right and go straight. You should be 
heading in the opposite direction where you came (but on the opposite side 
aswell). Kill guys as neccessary (it's easier to use the sentry guns). When you 
reach the very end, turn right and you should see 2 destructable crates. Blow 
them both up. One contains a rocket launcher and the other contains the third 
ammo pouch.

4: On level 25, long after you get to the first cheakpoint, you'll come across a 
large door. Press the red buttons on the right of the large door to unlock it and go 
through. Kill guys as neccessary. Go forward and run past the sentry gun (you 
can't kill it with your bullets). You should see a control panel with red buttons that 
is being blocked by 2 laser traps, keep it in mind. Be carefull of the laser traps, 
turn around and you should see a yellow panel. Destroy it and go left where it was 
blocking. Take a left and press the buttons. The crates will be lifted up and 
moved. Go left and be carefull of terrorists and falling crates (they can kill you!). 
Do not blow up the explosive barrels, they come in handy. When you get to the 
smaller crate in front of the larger crate (you'll notice it), stop. Hang a freakin' 
fast right and hide behind the large crate. Press the buttons and those blue 
explosive barrels will be lifted and dropped on the terrorists. After they are dead, 
go to where they were before they died. Go to the right corner of the area and you 
should see another yellow control panel. Blow it up and go back where you came 
from. Kill guys as neccessary. Go back to the control panel that was being locked 
by the 2 laser traps (avoid the sentry gun), and press the buttons on the panel. 
Large crates will be lifted up and dropped on the sentry gun, killing the pilot. Turn 
around, go forward and take a U-turn left. The 4 large crates blocking a path are 
now gone. Go forward and you will see a destructable box in the corner. Blow it to 
smithereens and voila! You have found all the ammo pouches.

Hidden Animation Sequence

Wait for demonstration mode to begin at the "Press Start" screen. Eventually, another sequence will appear after memo mode cycles a few times.

Max Power, Sudden Death, Trial Modes

Successfully complete the game on the hard difficulty setting to unlock max power, sudden death and trial modes.

Infinite Ammunition In Story Mode

When out of pistol ammunition in story mode, press B to reload.

All Multi-player Characters

At the "Press Start" screen, quickly press Up, Down(2), Right(3), Left(4), then hold C-Up and press Start to unlock all the Bosses as well as the engineer and a few army characters in multi-player mode. If you entered the code correctly, you will hear the sound of a gunshot. Most of the Bosses have odd guns and may not be able to back up against walls or roll. Alternatively, successfully complete the game on the easy and normal difficulty settings. Note: The code must be entered before demonstration mode begins.

Max Power Mode

At the "Press Start" screen, quickly press L, C-Right, C-Left, C-Right, C-Left, C- Down, C-Up, C-Down, C-Up, then hold L and press Start to unlock max power mode. If you entered the code correctly, you will hear the sound of a gunshot. This mode allows you to start with all weapons and infinite ammunition. Note: The code must be entered before demonstration mode begins.

Sudden Death Mode

At the "Press Start" screen, quickly press C-Left, C-Right, C-Left, C-Right, C- Up, C-Down, C-Up, C-Down, then hold L and press Start to unlock sudden death mode. If you entered the code correctly, you will hear the sound of a gunshot. This mode allows opponents and your character to be killed with one hit. Note: The code must be entered before demonstration mode begins.