"Get the Marines off the Ring before it is blown to kingdom come."
None Left Behind is the cut ninth mission in Halo SPV3. It is listed as SPV3D25, also known as D25.
Overview & Background
It would have the player return to the area from the level Halo but in reverse. Ultimately, the mission was doomed to fail due to the Spec Ops Covenant, Tanks, Sentinels, and Flood attacking at once and only 1 Pelican would've managed to get away.
- A beta of None Left Behind was going to be released but was cancelled due to the SPV3 team working on project "Oddball."