Skip Mission:
Requires the v1.33 patch. During play press Ctrl+Alt+Shift+End.

Level select:
Requires the v1.33 patch. Note: This procedure involves editing a game file. If you don't know what you're doing, don't try this. Use a text editor to edit the "dark.cfg" file in the game directory. Add the line "starting_mission". Now select the "New Game" option to play that level.

More Money:
Require the v1.33 patch. Note: This procedure involves editing a game file. If you don't know what you're doing, don't try this. Use a text editor to edit the "dark.cfg" file in the game directory. Add the line "cash_bonus". When you start, you'll find that you've got plenty of dough.

Basketball Court:
Go into the training level, put it on expert, and complete all the tasks until you reach the sparring section. Before your sparring partner goes to the back, run in front of him and run to the back until you reach a door. It's locked, so hit it with your sword until it pops open. On the other side of the door is a basketball court and a basketball so you can play basketball! There is also a bedroll with notes from the makers of Thief!

Thanks to Revolution readers Noah Van Holland, Dane Stearns, Guus van den Berg, and D. Lowery!