|BlueWarning.svg|| Unreleased Content
This page contains unreleased content. Spoilers may occur.
|Map Used||Modified Forge World|
|Inhabitants||Strike-team Orion, Strike-team Vector, Strike-team Iron, Dust, Shadow, Strike-team Rewind|
The UNSC Ultimatum is a Paris-Class Heavy Frigate. It was recalled to Reach to help protect it from the Covenant fleet, however it was boarded and stolen by Strike-team Vector. It was destroyed by an Anaconda Surface-to-Air Missile Launcher.