Currently in the early development stage, ‘Aeronautica’ is an upcoming 3D open-world steampunk game involving combat, trade, exploration and colonization with airships, biplanes and other vessels in a sandbox environment. The game world includes thousands of miles of procedurally-generated terrain which can be freely explored and settled (if your airship can carry enough troops or settlers to build fortresses or towns). Players will be able to fly their ships in first-person perspective from the pilothouse and walk through the ship while fighting in realtime battles. Although it mostly focuses on airship exploration and combat, it’s intended to be as open-ended as possible and may also eventually include surface ships, submarines, and (steampunk) ‘tanks’ if there is enough support.
Here are some early screenshots:
Below: The Imperial warship S.S. ‘Princess Grace’, showing the stern decorations (gilded horses and a large gilded heron, and of course a portrait of Grace herself on the side).
Below: ‘Grace under Fire’ (sorry for the bad pun): The “Princess Grace” surrounded by sparks and shrapnel during a battle against one of the Duke of Snoddly’s ships. Players can either fight alongside or against the Royal and seigneurial fleets, serve as a privateer or bounty hunter for one or more of the ruling families, or set out on their own to explore, trade, create colonies, or conquer.
Below: another image of the same battle. Snoddly’s ship can be seen at the top of the image. An Imperial Eagle Interceptor (winged dirigible) is in the lower right, and behind it is a player ship (mostly obscured behind the Interceptor).
Below: early screenshot of the pilothouse of the “Red Falcon”, a premium ship that players can purchase. Outside the window is an early version of the S.S. Princess Grace without most of its stern decorations.
Below: this is what the back portion of the same pilothouse looks like.
Below: several types of airship (at left, a premium player ship called “The Dragonfly”; at center is the “Red Falcon”; at right is one of the Duke of Snoddly’s ships).
The above are just some early screenshots and a quick description. I’ll try to update this page soon. In the meantime, the website has more info : http://starving-indie-developer.com/aeronautica.html