Also, I prefer the old Guardian where you had to hold the “Leader” for an amount of time before you could kill him. Makes the game mode more interesting
EDIT: IT WASNT “THE OLD GUARDIAN” I mistook it for Submission.
You captured one of the stranded in Submission but as someone else pointed out there was also Capture the Leader which is what you might have meant, so apologies, I completely forgot about that mode, It seems it was the successor to Submission.
Submission is when you have a living flag such as Chap from the gears 1 campaign and you had to hold him for a certain amount of time to win the round, Guardian was were you had to kill the other teams leader that was a playable character, and capture the leader was both combined but again the leader was a playable character but had to hold them for a certain amount of time.