Type during the game

 www.freespace2.com

 A message "Cheats activated" appears.

 Now hold [~] and

 [C]         -    Message to enemies
 [K]         -    Destroy target
 [Shift][K]  -    Destroy selected sub system
 [Alt][K]    -    10% damage
 [I]         -    God mode
 [Shift][I]  -    God mode for target ;-)
 [Shift][W]  -    Unlimited weapons for all
 [W]         -    Unlimited weapons for you
 [G]         -    All primary objectives
 [Shift][G]  -    All secondary objectives
 [Alt][G]    -    All bonus objectives

 Just type in the game:

 arrrrwalktheplank  A pirate ship appears
 tooledworkedowned  Any hit shows a picture of Jim Boone or Alan Lawrence