Invasion: Last Hope
Last Hope Showcase - YouTube

This is a sort of a spin-off of the last mission on Reach, where you must defend the area until Keyes can come pick up Cortana. **This game tends to be fast paced, so be smart about how you play**

Spartans
Phase 1: Your mission is to hold off the Covenant forces until the Pelican can achieve capable flight status and is able to leave with Cortana. Defend the gate and stop the enemy!

Phase 2: Should they breach the door, your next objective will be to defend the pelican at all costs. The Covenant want that A.I., and will attempt to destroy the pelican to find it.

Phase 3: If the enemy successfully destroys the Pelican, you must protect the A.I. and wait for back-up. Cortana is our Last Hope. If we lose her... all will be lost.

Elites
Phase 1: The foul Humans have taken the Construct! We must not allow them to defile such a holy relic! Deactivate the power nodes and unlock that door!

Phase 2: The Humans have hidden the Construct inside their ship! You must not let them escape with it! Destroy the ship and locate the Construct!

Phase 3: The Construct is there for the taking! Grab it and carry it back to our base! Vistory is close, my brothers!

Weapons
x3 Needle Rifle
x2 DMR
x1 Focus Rifle
x1 Plasma Launcher
x1 Rocket Launcher
x1 Sniper Rifle

Vehicles
x1 Ghost
x1 Revenant
x2 Warthog

Phase 1 (Territories)
Attacking team must deactivate the power nodes supplying energy to the gates. Once deactivated, the nodes will turn from red to white, and the gate will be unlocked, thus expanding the play area to incorporate Phase 2 and 3.

Attack Spawn

Defense Spawn

Locked Gate and Power Nodes

Activated Power Node

Deactivated Power Node

Phase 3 (Assault)
Attacking team must enter the Pelican and plant a bomb. Once the Pelican has been destroyed, they must sift through the debris to find the Construct (Core).

Defense Spawn

Play Area And Attack Spawn

Pelican

Inside The Pelican

Phase 3 (CTF)
Attackig team must locate Cortana (Core) within the Pelican debris and take it back to their base.

Pelican Debris

Core Inside Pelican Debris