Your empire can be any era (point of time). Military units will stay modern though when war is waged. Players that are in different era's will have to find ways to incorporate their era to meet the guidlines of the settlement.
- Underwater Settlement - Allowed for a min distance of 2 studs of the coastline. Underwater settlements will need to clearly indicate that its underwater and sustainable for the citizens.
- Floating Settlement - A settlement surrounded by ocean allowable for a min of 2 studs from the coastline. The settlement should be right at sea level and has many cannals.
- Floating Island Settlements - A settlement in the air, allowable for a min distance of 10 studs from coastline. Floating island settlements will need to have a good depth of landscape invested in it.