You need the update to v1.3.3 to make these Cheats work.

 Mission Skipping: If you're tired of a particular mission, pressing
 "Control-Alt-Shift-End" will cause the mission to end and allow you to
 move on to the next mission.

 Money cheat: You can give yourself loot by adding the line "cash_bonus" to
 your "dark.cfg." If set to an integer, its value is added to your loot
 total for loadout purposes.

 Starting Mission: You can start the game at a mission other than Lord
 Bafford's Manor by putting the line "starting_mission X" in your
 "dark.cfg," where X is the mission number to start at. When you select
 "New Game," you will start at that mission.

 Easter Egg:

 "Start a new game, and choose training. When you have completed first
 two tasks - walking in shadows and in quiet take your guns and start
 practising. When you`ll fighting with your sparing partner, I mean
 that who came from hallway and when you finish run quickly to table
 and the most important thing you have to take is the key. If you have
 enough time you can take other things (Apple and healing potion). Now
 run quickly there where is going your partner (that who were fighting
 just before) and go to the end of this hallway. At the end you`ll find
 door, but they`re locked. Now you have to use the key (I told you to
 take) and open them. In room you`ll find basketball, baskets, and a
 letter. Try to hit with the ball into baskets and read the letter.
 It`s funny.

 By Adam, adamg@cormay.pl