Part 14

After clearing an area, proceed up the stairs to face a Chaos Space Marine; use fury attacks and sprint away if your shield (a part of your HUD (heads-up display — the on-screen icons showing health, ammo and the minimap) that shows your health) is low.

Climb the stairs and enter the door.

Activate the lift and go through the next door.

Go down and pick up the storm bolter from the support pad.

Go back up and use the control panel to unclamp the Titan.

Go through the door to the right to face a flying turret; use marksman mode (a targeting feature) if you have the hammer, as it's difficult to shoot these with it.

Drop down onto the Titan and go down the stairs to the left to face a demon summoner and another flying turret; prioritize the summoner and keep moving.

After defeating both, a cutscene (a non-interactive cinematic the game plays automatically) shows the Titan destroying the orbital spire, and your battle brothers join you.

Use the lift they arrived in.

It is recommended to take the plasma gun and leave the thunder hammer for ranged combat.

Give the power source to Sidonus.

Continue through the door until Sidonus goes to the launch pad.

Fight agents of Chaos, using charged shots from your plasma cannon to take out larger enemies with one charged shot and some normal shots.

Use crates for cover (press the cover button to crouch behind walls or objects) and roll away when grenades are thrown.

Go through the door to the left and outside to trigger a cutscene.

Three summoners appear; use the autocannon behind debris for cover to the right, or if you don't have it, use the plasma gun with charged shots at close range.

Kill all chaos guardsmen, then two plasmas and two chaos marines appear; retreat to Sidonus's position and use cover to engage them, using fury if available.

Stay behind cover as plasma shooters can cause significant damage.

After defeating them, Mira shows up with a Valkyrie.

The captain decides to go alone to the spire to kill Nemeroth.

Use the lift to the corner right of the platform and go down.

You will see a Servo Skull to the right as soon as you descend from the lift.

After walking a distance, you will find ammo crates and a thunder hammer; it is strongly recommended to pick up the thunder hammer.

Continue and you will encounter enemy resistance, with guardsmen sometimes turning into chaos demons.

Use the thunder hammer to clear the area and move to the end platform with two summoners and plasma gunners; kill the summoners first, then the plasma gunners.

Go right from the top of the platform where the summoners appeared to find a large door; enter and keep moving.

You will find ammo crates and melee weapons, but it's advised not to swap the thunder hammer.

Move out and you will see demons being summoned in the distance; go there and kill all the chaos demons.

A plasma weapon may be present but might run down; if it is, go down and kill it.

Warning: Do not go down where a chaos guardsman is manning a turret.

Go back up to where the first set of demons appeared and throw grenades at those below, then shoot any remaining enemies with your plasma gun.

Go down and pull out the heavy bolter (the turret) and take it with you after killing the three demons that appear.

Go inside and find a Servo Skull on top of crates straight ahead; as you approach, many demons will appear.

Use the heavy bolter on them, then go right to encounter a portal spawning chaos guardsmen; shoot them.

A summoner appears with more demons; ignore the demons, run to the summoner, and take it out first, then deal with the demons.

Move through the next door and keep going until you meet...

The Raven Guard (a sub-division of Space Marines) will assist you.

You will reach a large bridge filled with Chaos forces; smash your way through the hordes with help from the Raven Guard.

More Ultramarines will join the battle later.

Take cover when needed and defeat foes one by one on the long bridge.

At the end of the bridge, your transport, a copter, will arrive and take you to the spire.