Use the folowing name for your company:

DO IT AGAIN - If you press CTRL+C during a mission, you will finish it

(note: this cheat was in the Syndicate Plus list, but you can do it in the normal version as well)

Cheat:

Use the following as company name, you will have special cheat:

ROB A BANK - $100,000,000
NUK THEM - Attack any country
TO THE TOP - $100,000,000 and attack any country
COOPER TEAM - Same as TO THE TOP and with full weapon
WATCH THE CLOCK - Speed up research time