OK it's only a bit similar, but still! It's similar!
Halo, opening cutscene on two betrayals:
CORTANA: I've spent the last 12 hours cooped up in here, watching you toady about, helping that thing get set to slit our throats!
Do you have any idea what that bastard almost made you do?!
MASTER CHIEF: Yes... [save humanity]
Marathon, terminal 1 on blaspheme quarantine:
DURANDAL: I was watching what Leela was having you do: 'save the ship, save humanity!' And just what or who are you saving them
from? And to what end?