"Get those turrets up. You watch your fields of fire." - To a group of Marines in a cave inside Crow's Nest.
"Quiet. Cut the chatter." - To a pair of chatting Marines inside the cave area.
"Calm before the Storm, Marines. Enjoy it." - By him or by Stacker, Crow's Nest.
"Point of entry, best assessment!" - After a vigorous shake in the cave area he is stationed in.
"Agreed. Master Chief, get there." - After a Marine suggested the Hangar.
Co-op Change: "Agreed. Chief, Arbiter. Get there."
"Drones! A whole swarm! Take 'em down! Short, controlled bursts!" - Outside op-center, which Drones attempted to assault at.
"If I try to hook a timer, it might go off all by itself."- Said in front of the Improvised UNSC bomb, only if Sergeant Stacker is the Sergeant commanding the Marines in the cave area.
"You did the best you could, Sir. Let's get the survivors up to the hangar. There's an elevator just outside the barracks." - After being saved by the Master Chief, exclusive to co-op, as the Arbiter says this line in Campaign Solo.
"What happened?" - After the SPARTAN-117 wakes up after the elevator fell.
"Settle down, Marines! Somebody hit the emergency power." - To the surviving Marines in the underground vehicle maintenance.
"If you can walk, set your boots on the line." - To the marines, after the emergency power is activated.
"Not sure. Can't reach the Commander. Too far underground. Let's mount up. Get the hell outta these caves." - When a Marine asked him about the situation.
"Chief's got the right idea, Lets mount up, get the hell out of these caves." - When the SPARTAN-117 got into a Warthog or opened the door leading outside the base.
"Second Squad! Coming through!" - Riding in the Warthog through the tunnel.
"Don't leave any of 'em standing." - To the Marines
"Conserve ammo. Run 'em over!" - Commanding marines in a Warthog.
"Chief, still can't get the Commander. COMs are a mess. Pelicans are scattered. Best thing now, get some distance between us and the base. Brutes are gonna be looking for survivors." - To the Chief after they got outside the cave.