"Could you sacrifice me to complete your mission? Could you watch me die?" - Halo 3

"Then there's still hope." - Halo Infinite

"Hey Rookie, you out there? Respond, that's an order!" - Halo 3: ODST

"You impress me, Human. Your singular valor will be preserved and studied, once your Composition is complete." - Halo 4

"When you look back on these last days you will realize that all you built... was a tomb. A place where hope dies." - Halo Infinite

"You are performing incredibly well. Funny. I imagined Cortana would try to stop you by now." - Halo 5

"Then there's still hope." - Halo Infinite

"I took care of my own arrangements, rather than wake you. I didn't want to, well, I hope you can forgive this final breach of protocol. It was a pleasure and an honor to serve with you, sir. Goodbye, Captain. Serina out." - Halo Wars 2

"Ask the Oracle about Halo. How they would sacrifice us all for nothing." - Halo 2

"If you understood what she has become, you would not speak of such juvenile concepts as home." - Halo 5

"Once the shield is down, we will head straight to the Library. I do not wish to keep the Hierarchs waiting." - Halo 2

"I tire of this doctor. You have been chasing shadows for weeks to no avail." - Halo 5

"It's enough." - Halo Infinite

"Negative, Infinity. I don't like it." - Halo 5

"I know we're losing... I want to know if we've lost." - Halo Reach

"A bloody fate awaits you and the rest of your incompetent race. And I, Tartarus, Chieftain of the Brutes will send you to it!" - Halo 2

"Your forefathers wisely set aside their compassion, steeled themselves for what needed to be done. I see now why they left you behind. You were weak. And gods must be strong." - Halo 3

"This is not your grave, but you are welcome in it." - Halo 2

"Sir, requesting danger close. On our location, trailing north. Commence five seconds." - Halo Wars 2

"Tell that to the Covenant." - Halo Combat Evolved

"Did you hit your head or something? My instructions were to enter this installation, imitate Cortana and lock her down for retrieval. Yours were to take her back to the Infinity for deletion." - Halo Infinite

"Real pretty. Friend of yours?" - Halo 3

"Blue Team, report. ...Sierra 117 to Blue Team, report. ...Sierra 117. Does anyone copy?" - Halo 5

"I am the remains of the Forerunner once known as the Librarian. My memories were retained to assist humanity on their path to the Mantle. Though sadly, that plan is now at risk. The Didact is leaving Requiem. Soon. You must not allow it." - Halo 4

"Unacceptable! Unacceptable! Absolutely unacceptable!" - Halo Combat Evolved

"This is the Pillar of Autumn. We're away...and the package is with us." - Halo Reach

"You were right, he was not friendly. By the looks of him he was some sort of leader. They called him Tremonius." - Halo Infinite

"After exhausting every other strategic option, my creators activated the rings. They and all additional sentient life within three radii of the galactic center, died, as planned." - Halo 2

"The Endless will return." - Halo Infinite

"Voridus! The Orbital Designator shows they're coming from a nearby launching bay." - Halo Wars 2

"Just promise me one thing: Whatever happens, save him. He needs you. You're all he has." - Halo Infinite

"Your evolutionary journey must be accelerated." - Halo 4

"We lost. We lost everything. There's nothing left for us here. I don't even know where here is." - Halo Infinite

"All the way to the end, brother." - Halo 5

"Affirmative. It's the Winter Contingency!" - Halo Reach

"Usually the good Lord works in mysterious ways, but not today. This here is 66 tons of straight-up, HE-spewing, dee-vine intervention. If God is love, then you can call me Cupid!" - Halo 2

"I took care of my own arrangements, rather than wake you. I didn't want to, well, I hope you can forgive this final breach of protocol. It was a pleasure and an honor to serve with you, sir. Goodbye, Captain. Serina out." - Halo Wars 2

"Sleepers! Take 'em out, nice and quiet!" - Halo Combat Evolved

"Where the hell are we, Serina?" - Halo Wars

"A Spartan is a symbol... In times of darkness, we are hope. And together... we are unstoppable!" - Halo Infinite

"Do not be afraid. I am peace; I am salvation." - Halo 3

"Infinity! This is Sierra-117 of the UNSC Forward Unto Dawn. Do you copy?" - Halo 4

"Look... I understand what you think you saw." - Halo 4

"Buck? Who knows if he can hear me but... I'm sorry. I should have told you more about this mission, more... about everything." - Halo 3: ODST

"Cocky bastard...just loves to run his mouth." - Halo 3

"No thanks to your driving, yes." - Halo Combat Evolved

"I shall spare her inevitable suffering of your betrayal and end you now. The Mantle of Responsibility belongs to Cortana and the other Created. I shall see it remains forever beyond your grasp." - Halo 5

"My vote? Hole up, wait for backup." - Halo 3: ODST

"Cortana, all I need to know is did we lose them?" - Halo Combat Evolved

"Double kill!" - Halo Multiplayer