| You will unlock a secret achievement by finding all | | | | Head to the stage's first tower and stand on the |
| seven terminals listed below: | | | | elevator. Face the control panel, and then turn left. |
| Terminals: The Ark | | | | Jump over the obstacle, and find the terminal you |
| Go left through a door once in the very first building of | | | | seek. |
| the stage. The terminal is located beyond a curving | | | | Head to the stage's second tower and walk towards |
| passage. | | | | the entrance. When you come across a locked door, |
| A terminal is located right near the device that | | | | turn around to find the second of three terminals here. |
| activates the bridge on this stage. | | | | Head to the stage's third tower and stand on the |
| There's a secret room in the third building which holds | | | | elevator. Face the control panel, and then turn right. |
| the third and final terminal on The Ark. After you come | | | | Jump over the obstacle, and find the third and final |
| across and kill a group of sleeping Covenant enemies, | | | | terminal on the stage. |
| head down the nearby corridor. You'll reach a door | | | | Terminals: Halo |
| that is locked if you do. To the left of the locked door | | | | Traverse the first cave, and then head right until you |
| is an open door. Head through the door, and then turn | | | | come across a building. Walk along the passageway |
| around to find the terminal. | | | | towards the building. Once inside, run left to find the |
| Terminals: The Covenant | | | | terminal. |