Evil Genius/Rooms

A solid mountain doesn't make much of an evil lair, so you'll have to build rooms and corridors to give you somewhere to bring your megalomaniac schemes to fruition.

To build a new room or corridor, on an empty area of the mountain and select the room you want from the menu. Drag out the outline with, and click the Accept button to move to the next step. Click the Items icon to place equipment and furniture, then click the Pickaxe icon to begin the building process.

Corridor

 * Cost per square: $100

Strong Room
To store the riches you'll accumulate from your campaign of villainy, you need a Strong Room. You'll start with a small one in a shack on the island, but you'll need to move it to a more secure location before the forces of international justice find it.
 * Cost per square: $400

Barracks
The Barracks is required to hire more minions for your evil army. The larger and better-equipped the barracks is, the more minions you'll be able to recruit.
 * Cost per square: $150

Control Room
To coordinate your World Domination, you need a Control Room and the communications equipment it can house.
 * Cost per square: $500

Mess Hall

 * Cost per square: $150

Training Room
While Construction Worker minions are useful, they have limited talents. To give them more advanced and specialised skills, you need somewhere for them to train.
 * Cost per square: $250

Archives

 * Cost per square: $300

Armory
In addition to being the primary location for your minions' weaponry, the Armory contains holding cells which are essential for the capture and interrogation of enemy agents.
 * Cost per square: $250

Infirmary

 * Cost per square: $300

Laboratory

 * Cost per square: $400

Staff Room
Somewhere for your minions to unwind and build up their stats.
 * Cost per square: $150

Hangar
A pointless glass catwalk over the DDD cave.
 * Cost per square: $250

Inner Sanctum
A private accommodation for your Evil Genius, the Inner Sanctum is where you'll hold meetings with other criminal masterminds.
 * Cost per square: $250

Power Plant
Everything in your base requires electricity to run - while you'll have some power to begin with, as your base grows you'll have to build more Power Plants to supply it.
 * Cost per square: $150

Freezer
Kill an enemy agent and they'll leave behind a body bag, which will raise the suspicions of any enemy agents or tourists who wander into your base, and can lower the Loyalty of your own minions. To keep them out of sight, build a Freezer.
 * Cost per square: $350