To speed up the game (these keys can be combined):
Hold down the:
 
to
To temporarily disable sound.
 
To skip all built in delays.
 
To resolve fights after one exchange of gunfire.
To cheat:
 
Allows you to enter the number of a card which you'll then receive. Using this feature will invalidate your score for the purposes of the high score list.
The following keys are used in combination with clicking on a hood:
 
:
Get info on hood.
 :
:
Attack/place with all your wiseguys.
 
:
Attack/place with one of your wiseguys.
 
Attack/place with half of your wiseguys.
These two options allow you to check email or (gasp) work while playing Deathground:
When launching game, hold down one of the following keys:
 
:
To play in large moveable window, don't hide menu.
 
:
To play in small a very small moveable window, don't hide menu.
 
Hitting the B key during game play will trigger the "Boss Coming" feature. Deathground will hide itself as quickly as possible. So go ahead, play it at work or school!