With Your Shield or On It
From Halopedia, the Halo wiki
With Your Shield or On It is an achievement in Halo: The Master Chief Collection. This achievement is obtained when a player completes every level of Halo 3 on the Heroic difficulty or higher.
Trivia
- The name is taken from an ancient Greek phrase said by the relatives of Spartan warriors before they departed for battle. If they died in battle, they would be carried back on their shields, and if they were victorious they would keep their shield.