Free play:
     Successfully  complete  the  game  with  an  "A"  rank. Enter the
options  screen and select "House Of The Dead 3". You can now increase
the  credits  past  nine  until "Free Play" appears. Alternately, play
well and get better than an "A" rank one or more times during the game
at  the  point where you lose all your credits. This works best in one
player mode.

Easy game completion:
     Set  the  options  to  9  credits, 5 fire things, and you must be
playing  with  a  light gun. Set the light-gun to auto-fire so that if
you hold the trigger you will fire more bullets faster. You can defeat
the giant opponent easily. With the four legged monster, you must have
very  good  aim  for  the full effect of the bullets from the gun. The
final  silver  Boss  is  the most difficult. Shoot the blades once and
they  will  disappear,  Shoot  the  lighting  once  and  it  will also
disappear.  When  he  turns  brass  just  keep  shooting  and  he will
eventually die.

Bonuses:
     To  get  the  bonuses,  you  and/or  your  partner  cannot  use a
continue.  The  bonuses  are  located  just before you reach the final
Boss.  If  you  choose  the  parking  entrance,  keep  going until the
"security guard" chases you twice. After the second time, look to your
right  and you will see three to four barrels. One of them has a bonus
in  it.  If  you do well enough, you will get some boxes with items in
them before you face the Wheel Of Fate.

Endings:
     After you see Rogan and G finish talking, you will see Daniel and
Lisa  talking.  Then,  Lisa will start walking ahead of Daniel. Daniel
will  tell  her  to  wait, then he will start talking to himself. They
will  then  walk  off. ! After you see Rogan and G finish talking, you
will see Daniel and Lisa talking. The same thing will happen, but then
you  will  see  a  van moving. After that you will see the last zombie
driving  the  car.  Lisa  will say "Come back you slimy bastards", and
start running.