accumulate flags. The S0 module must be attached to the US Science module first, so keep that in mind when starting to build your station.

Special: These modules have a variety of functions and capabilities, ranging from the Quest Airlock to the Z1 Truss to the Soyuz crew transportation vehicle.

Select your module by choosing the module type, followed by the specific module you wish to purchase. US modules must be sent to the station using a Space Shuttle, while Russian modules require the use of the RSA Proton rocket. Once you have chosen your module, click the Purchase button, which takes you to the purchase screen. Allocate flags from the five agencies, so that the safety rating is in the green condition.

Next, click the Configure button to select the location to place the module. You will now see an image of your station with green arrows attached. Click on the arrow at your desired locate point. Your new module will move to where you place it. Some modules have hatches on either end and can be