Cheat Codes
     Start the game with the command-line parameter "+set developer 1"
to enable the cheats. While playing, press [~] (tilde) to bring up the
console, then type any of the following cheat codes.

Example: "C:\Medal of Honor Pacific Assault\mohpa.exe" +set developer 1 

     Note:  Make  sure  you use this parameter with the mohpa.exe file
and not the mohpa_setup.exe file which is installed to your desktop by
default.

Alternate Method
     Instead  of  using  the command-line parameter, you can edit your
player config file, located by default in "My Documents\EA Games\Medal
of    Honor    Pacific   Assault\configs".   The   default   file   is
"unnamedsoldier.cfg".  Open this file with Wordpad.exe. Go down to the
section // Cvars. Add the following line to this section:

seta developer "1" 

     Save  the  file.  This should enable the console once you go back
into the game. Still use [~] (tilde) to bring it up.

Cheat code:             Result:
dog                     God Mode
wuss                    All Weapons
fullheal                Full Health
notarget                Enemies Ignore You
noclip                  No Clipping Mode
fps 1                   Show FPS
maplist                 Load Any Level (double-click map name)
map [mapname]           Load Map [mapname] (use names from maplist)

Alternate Method #2
     If  you still cannot get the console to come up, you can actually
bind  the  cheats to keys using the config file which does not require
access to the console. Open your config file with Wordpad.exe (located
by   default   in   "My  Documents\EA  Games\Medal  of  Honor  Pacific
Assault\configs"). The default file is "unnamedsoldier.cfg". Under the
//  Key  Bindings  section,  simply  change any of the bindings to the
cheat codes. For example:

bind F1 "dog"
bind F2 "fullheal" 

     Then,  while  playing,  each time you press F1, you will have god
mode, F2 will give you full health, etc.