Guide briefing
Even Tempered: Beat Halo Without Upsetting Anyone
Enable Temperamental, run the Halo mission on Easy, avoid every source of friendly damage, and let Marines handle the final rescue fights from the Warthog.
Before you start
- — Collect the Temperamental Skull in The Most Dangerous Game bonus mission.

Target
Set up the achievement run
- Checkpoint
- Mission selection
- Landmark
- Temperamental enabled in the Skull menu.
Do this
- 1Select the mission Halo, not the entire campaign.
- 2Choose Easy difficulty.
- 3Enable Temperamental and start the mission.
Confirmation
Halo begins with Temperamental listed as active.

Target
Preserve friendly status
- Checkpoint
- Entire mission
- Landmark
- Any area containing UNSC Marines.
Do this
- 1Do not shoot, melee, grenade, or run over a Marine.
- 2Avoid firing through a Marine toward an enemy because a single betrayal can turn the squad hostile.
- 3Treat grenade splash as unsafe even though the game may sometimes classify it as accidental.
Confirmation
Marine indicators remain friendly and no squad attacks you.

Target
Secure the Warthog
- Checkpoint
- Tunnel exit
- Landmark
- The Pelican drop zone where the Warthog arrives.
Do this
- 1Run past optional early encounters on Easy.
- 2Exit the tunnel and wait for the Pelican to deliver the Warthog.
- 3Take the Warthog toward the three lifeboat rescue areas.
Confirmation
You are driving the Warthog toward the first rescue site.

Target
Clear the cliff rescue site safely
- Checkpoint
- First of three lifeboat rescues
- Landmark
- The cliff-side structure with Marines below the surface.
Do this
- 1Clear the exterior Covenant before moving into the Marine position.
- 2Enter the underground area carefully and identify Marines before firing.
- 3Remove the remaining enemies with deliberate shots that never cross a friendly silhouette.
Confirmation
Echo 419 is called for evac and the rescued squad remains friendly.

Target
Turn the Warthog into a safe escort
- Checkpoint
- After the first rescue
- Landmark
- Friendly Marines waiting near the Warthog.
Do this
- 1Drive slowly beside the rescued Marines and let them board.
- 2Avoid turning sharply through the squad or accelerating while a Marine is in front of the vehicle.
- 3Use the passengers as the primary source of fire for the remaining rescue sites.
Confirmation
Marines occupy the Warthog and engage enemies for you.

Target
Complete the final two rescues
- Checkpoint
- Second and third lifeboat sites
- Landmark
- The mission nav markers for the remaining survivor groups.
Do this
- 1Drive conservatively to the next rescue area and stop before entering the Marine formation.
- 2Let the Warthog gunner and passengers clear most Covenant targets.
- 3Use your own weapon only when the line of fire is separated from friendlies.
- 4Repeat at the final site and wait for the last enemy wave to end.
Confirmation
The mission completes with no friendly betrayal and Even Tempered unlocks.