The Orbital Sciences CEV Add On will closely simulate
Orbital Sciences' concept for NASA's Project Constellation.
This will be an on-going project, and changes will be made to the concept when Orbital Sciences releases updates.

Do You Have What It Takes?

The Orbital Sciences CEV Add On will be the closest simulation to the actual CEV currently possible. So climb into the cockpit and see if you have what it takes to fly the various CEV missions.