Underground Bunker

Overview
The Underground Bunker is a premium building introduced in the 3.2 Patch that provides players with 4 more workers. It yields a very high amount of and  and is comparable to a better version of the Suburban House. This is outweighed by the fact that this building costs a considerable 120 and that it takes 20 hours to collect.

Updates
3.2 Patch
 * Building added.