SimTower
   By:  Maxis
   Release date: 

   The codes.

   To double your startup money, don't build,
 select new tower, scroll underground and
 all the way to the left, click on the very left
 lower corner of the edit window. You will
 get only one chance to do this per game.

   Two and three level lobbies. After you start
 a new tower hold the keys below while clicking
 in the edit window where to place lobby.

 CTRL          Two level lobby.
 SHIFT CTRL    Three level lobby.