- Added D2 Hab Ring: This is a variant of the Nautilus Centrifuge that has a Size 3 hub. It cannot retract its ring, and it sports 4 Omni Converters instead of the Pathfinder template system, but it's otherwise identical to the Nautilus Centrifuge.
- Added D2 Conference Room: This is a half-height version of the D2 Briefing Room's upper floor.