Various cheats
     Press  "C" during the game to activate the Chat-Window,then press
"BACKSPACE".

Cheat code:             Effect:
WIN                     Win Mission
MY TAYLOR IS RICH       20,000 Points and 100% Popularity
REPLAY ALL MISSIONS     Access All Missions

Attack faster
     Build  structures that make units (Barracks, V. Factories, etc.),
then  have  each  of  them to make units. For example, if you made two
Barracks  and  told one to make fifteen soldiers and the other to make
fifteen  soldiers,  both  barracks will make them. This works for both
IPC and GHOST. This trick will allow you to make soldiers and attack a
lot faster.

Skirmish mode
     The  best  map is Sardines as you can build more on there. A good
trick  is  to build all the newest things that comes out. However this
will require a lot of money, and some of the new things you unlock are
useless.  For  example,  the  planes,  spies,  commandos, subs, boats,
advanced things, doctors, civilian helicopters, and grenadiers.