During a mission, type "freespacestandsalone" to access all of the FMV sequences in the Tech Room.
Cheat Codes
While playing the game, type "www.volition-inc.com" to enable cheat mode. Then, hold ~ and type one of the following codes to activate the corresponding cheat function. Note: Enabling cheat codes will prevent mission advancement. The infinite weapons code however can be used without penalty in campaign mode. Simply enable the code in single mission mode. Quit the single mission and resume a campaign mode game.