In the first phase of the game, you construct a house, protecting your vault and family from intruders. A number of different items can be placed in the tile-based map: walls, doors, traps (like pits and electric floors), wiring with switches, and guard dogs. You must test the design first before it is submitted online for others to rob, and the attempts of others are recorded so you can improve your design. If you choose to invade other homes to earn money (you earn some money from burglars that die in your house), you can take up to eight items to disable the various traps and cut down walls. The free-form home design and tense robberies are hallmarks of this well-designed game.