The map has gone through several changes for HCS play. Many of these changes have been reflected in the baseline version.

-Oddball support has been added.
-Pelican position has been tweaked slightly.
-Pelican Platform has been lowered by eight world units.
-Crates and elevated platform near the pelican have been changed to open sightlines through the area.
-Small curved wall added near the pelican for grenade bounces.
-The door leading into the underpass from bottom mid has been opened.
-The window above underpass is more accessible from the interior.
-Crate clutter has been lessened.
-Lift mechanics have been made more consistent and clamber support has been added.
-The piston moving up and down will no longer kill players caught in it. The openings on the piston casing have been made taller, and players will now be forced out when the piston rises.
-A central column has been added to the piston.
-Red spawn geometry has been adjusted slightly.
-Map lighting has been adjusted.
-Various broken clambers and other bugs have been fixed.
-Spawns have been adjusted.
-Weapon layout has been tweaked slightly.
-Slight geometry and visual changes have been made to mirror the HCS version (without sacrificing as much as that version to maintain original art).
-Original three stage activation easter egg has been changed.

HCS Specific changes:
-Greater visual changes were made to stabilize framerate.
-Piston is now stationary.
-The clamber ledge from basement to deck has been removed.
-Pelican door has been closed.
-Additional invisible blockers have been added to improve thrust slides and other advanced movement.
-Grenade Launcher has been removed.
-Sniper Rifle has been replaced by Rocket Launcher.
-Active Camo has been moved to the back of the pelican.
-Plasma Pistol has been moved to top mid.
-Needler has been moved to engine room.
-Brute Plasma Rifle replaced by Boltshot.