Gameplay

Third Time's A Charm

From Halopedia, the Halo wiki

Third Time's A Charm

Third Time's A Charm is an achievement in Halo: The Master Chief Collection. It is unlocked by playing Halo 3 on the 25th of any month - the day in September, 2007 when the original game was released. The achievement will unlock as soon as the player begins a campaign mission or multiplayer match. The achievement is worth 5 Gamerscore.