The Name tells you who the character is. Height tells you how tall they are. (Short or average is good.) The Weight tells you how far the characters polygons are stretched. (Wider isn't better. It just means that they are easier to shoot.) The color is the tone of their clothing. Some dark clothing matches in with the background. Sex tells the gender; this is for people who prefer playing as a character of a certain gender. Best Weapon is really a suggestion. I took in to account the size of the character, clothing color, how far recoil pushes them back, and aiming time. Because of the difficulty in aiming hunting knives and explosives; I left them out. And to save time; I will not list the "best weapon"  suggestions for the extra characters like the staff and those people you shoot at all the time in the game.

This is a long code -- 10 steps -- and may take a few tries to enter properly. You can do this code anywhere, but it's best to do it on the Multi-Player Character Select screen while looking at the last available character (Mishkin or Moonraker Elite 2). Then:

1. Hold the L and R Buttons and press C-Left.
2. Hold the L Button and press C-Up.
3. Hold the L and R Buttons and press Left on the digital Control Pad (NOT the Control Stick).

Note: Doing this will select a different character on-screen. This is supposed to happen.

4. Hold the L Button and press Right on the Control Pad.
5. Hold the R Button and press Down on the Control Pad.
6. Hold the L and R Buttons and press C-Left.
7. Hold the L Button and press C-Up.
8. Hold the L and R Buttons and press Right on the Control Pad.
9. Hold the L and R Buttons and press C-Down.
10. Hold the L Button and press Down on the Control Pad.

No sound is made to indicate the code was successfully entered. If you entered the code correctly, you will be able to select from nearly double the characters you had access to before. Note that this code will open all of the hidden characters, even if you haven't finished the game. One drawback is, your game will not save this code, so you'll have to re-enter it every time you want to use the extra characters.

Scroll Through Weapons Backwards

Press and hold A, then tap Z (or press them both at the same time) to scroll through the weapons backwards.

Floating Mines (Bunker)

This code allows you to float mines anywhere! First go to the bunker in battle mode, make sure you have remote mines as your weapon. Plant eight mines on the TVs that hang from the ceiling. After every TV has a mine on it go to the detonator and blow them all up. Now refill on mines and toss one. Nothing happens, but if you back up you will see a mine floating! You can plant mines anywhere in the Bunker after the code has been done.

Invisible Odd Job (Archives)

Play the multi-player mode in the Archives levels (without the radar). Choose Odd Job as your character, go into the basement, destroy one of the metal crates (make sure the top is still on), then go into the crate, duck, put your head down, and you won't be able to be seen by any other players.

Invisible Mines

On any multiplayer level, stick a remote or proximity mine on a box of ammo or a weapon, then pick it up. Even the mine seems to have disappeared, it's still there. Remember, you can either trigger it by bringing up the watch or simply press A & B at the same time to detonate it. OR. Kill another player. Now place a mine on a weapon that the defeated player lost, then pick it up. The mines will be invisible forever. Since no power-up will reappear in that spot, it will look like there is nothing there. Use this trick for a nice proximity mine surprise.

Mixed Weapons

This trick allows you to pair up more weapons (not only the ones you can pick up twice). First of all, you must have two sets of paired weapons that appear next to each other in your weapon list as well as ammo. One example of this is the Military Archives, where you can have two Dostoveis and two Klobbs. Now cycle through your weapons backwards (press and hold A, then tap the Z button) until you have two of the second set of weapons ready.
1. Press and hold A
2. Press Z twice before cycling forward
3. Release A
4. Press A once.
5. Press Z to fire two or three times to fire while the weapons are changing .

If you did it right, firing the weapon will result in a glitch that leaves a second weapon up as well. If you have the All Weapons Cheat enabled, you can virtually do any combination

Facility Vent Trick

While standing on the toilet under the vent opening hold R C-Left and Left on the control stick. You should see inside the vent then let go of all the buttons and hold up on the control stick, until you're in the vent. Use this trick to make peoples lives miserable or re-enact scenes from "Alien".

Blow up Remote Mines without Watch

First, toss the mine as usual but instead of going to the detonator watch, press A and B at the same time. The mine automatically blows up and you still stay on the mine weapons screen.

Play same character for 3 players

The following trick allows players to use the same character for upto three players in a four player deathmatch.

1. In 4-player multiplayer mode, goto character selection screen and set the character who is to be multiplied as 'Player 4'.

2. Choose characters for players 1, 2, and 3.

3. Back in the multiplayer mode screen, change number of players from 4 to 3. Now, go to the character select screen and set Player 4's character as Player 3. Pick any character for players 1 and 2.

4. Back in multiplayer mode screen, change number of players from 3 to 2. Now, go to the character selection screen and set Player 3's character as Player 2. Pick any character for Player 1.

5. Now, simply change the number of Players back to 4 and start the game. Players 2, 3 and 4 will be the same character.

"Be a real pain." Choose multi-player and switch to Flagtag mode. Pick the Archives battle arena. Once you get the flag in the game, run into one of the rooms with only one way in, close the door and stand directly in front of the door. The flag will be sticking out from behind the door, everyone outside the room can see it but can't get in. You can taunt them for as long as you like.

"Ghost Busters." Put the game on 'Slappers-Only' and put the 'Invisible Bond' cheat in. Now, choose a common place to meet (Outside of the Bunker works good.) and go there. Once everyone is there. The rules get simple. No leaving until you kill someone or get killed. The fun part is trying to find the other people.

"I live in your Basement." In the Complex Level. Put the weapon at "Remote Mines" and the first one to the basement must do their best to try and keep the other people out. Whoever holds the basement the longest wins.

"Duel." Find your enemy. Stand back to back. Raise your gun, step three steps forward, turn and fire.
(Works best on "License to Kill".)

"Grate Escape." Put the weapon to 'Remote Mines' and use the Faculty. Everyone gets in to the Faculty Grates. One person sets a bunch of Remote Mines in the Grates and at the count of three. Someone shoots one of the Remote Mines. The Mine will explode and set off a chain reaction. The person who escapes and/or survives wins.

"Fire in the Hole!" Find a long hallway in any of the stages. Put the weapon on "Remote Mines". Have
everyone get a bunch of the mines and line the walls with them. Everyone stands in the same place
and at the count of three; everyone detonates the mines and runs. Last person alive wins.

"Brutish Intelligence." Slappers only + License to kill + Faculity (Or Bunker) = Great way to let out all that pent-up agression and just relax.