While playing the game, press [Ctrl] + [Alt] + [Shift] + [End]. Note: You will not collect money from the current mission.
Blooper mission
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "user.cfg" file in the game directory. Add the following lines to the file, then start the game and begin a new mission:
play
starting_mission 16
Alternately, install Dromed from the Goodies folder on Thief Gold disc one. Then, start Dromed and open mission 18. Press [Alt] + G after it loads to enter the game.