Kill .switch Cheats (PlayStation 2)

Once you beat the game on either level of difficulty, mission select 
  shows up on the option screen


      Beating Archer (last 
      level)

      In the last part of the last level Archer (the bad guy) comes out 
      and you have to beat the piss outta him until his energy bar 
      empties.  The best way to beat him is to first before running up 
      to the door he is at get as much health and ammo you can.  Next 
      take out your grenade launcher thing.  As soon as the door opens 
      and Bishop (you) yells ARCHER!!! unload every grenade you have on 
      him before he walks through the door way.  After he goes through 
      the doorway take cover immediately behind the closest crate.  
      While hiding if you have any grenades through them at him.  If 
      he's still not dead after that take out your M1 shotgun and look 
      up and unload.  Don't stay up for too long or he will easily drain 
      your health.  What ever you do, DO NOT TRY TO HIT HIM.  He's too 
      powerful and will kill you probably before you even hit him.  Do 
      this and it will be relatively easy to beat him.  After his health 
      is drained he limps back into the door from which he came.  This 
      means you won and the game is over.  You also get to see this 
      sweet little cut scene of Bishop killing Archer with the same gun 
      Archer used to kill Bishops girl.

      

      Grenade Strategy

      In certain levels as soon as you walk into a room about 10 guys 
      see you and run in different directions.  An easy way to kill them 
      all is before going into the room hide behind a wall and toss in a 
      regular grenade.  When the grenade explodes it should kill them 
      all because they might not notice it.  If any are left just shoot 
      em of you could through in a flash bang grenade and run in shoot 
      them (only do the flash bang one if you have low health).  If 
      multiple enemies are behind an object through a grenade at em but 
      make sure it goes BEHIND the thing they're hiding behind.  If the 
      grenade explodes in front of the thing no damage will be done to 
      your enemy.  

      

      Secret  weapon storage

      On North Ker/e/a on the part were you have to turn on the brides 
      power. after you do that walk out of room to your right is 2/3 guy 
      take them out and head down to were you shoot them NOTE: there 
      might be 1 more guy in there, in there is MCRT 300 Magnum 5 clip 
      Sniper rifle and some health.