Press \ to display the console window and type "backdraft". Now you can enter one of the following codes:
List console commands: cmdlist
Mission select: start1 [1-26]
$666,666 money: talks
Complete current mission: finish
View current mission number: number
List missions: list
Restart mission: start
Set time of day: daytime [0-24]
Write debug information: report
Toggle floor polygon display: sfp [0 or 1]
List configuration parameters: set
Clear console window: clear
Quit game: quit