Earn Gems of War's Game Breaker Achievement Guaranteed for a Limited Time By Kelly Packard, 19 Dec 2017 CommentsGems of War is a free-to-play puzzle game that is always receiving new achievements. Many of the title update achievements are tricky, time-consuming or luck-based to earn. For a limited time, the luck can be taken out of earning the Mongo troop for the "Title Update 2" achievement set.Through Gems of War's 12 Days of Christmas event, free gifts are being delivered every day to players' in-game mailboxes. One of the daily gifts was a free Mongo troop, which is the troop needed to unlock the Game Breaker achievement. While the card was offered for free on its release, that limited-time opportunity ended long ago, and players now have to take their chances getting it in a chest.The Game Breaker achievement in Gems of War worth 11 pointsUnlock the troop "Mongo"But if you're familiar with Gems of War's mail system, then you know you need to act quickly. Unopened mail expires after a period of time. According to commenters on Game Breaker's achievement solution, the Mongo mail sent out is expiring on December 21st, so you need to be fast to snag this one.Update: The comments also indicate you may need to log in and log out to start receiving in-game mail and get the item.We've got the full list of Gems of War achievements - check the list for guides to unlocking them.Achievement ReminderXbox LIVE EventXbox One Written by Kelly PackardIn a few descriptors: college student, longtime gamer, writer and junk food enthusiast. I contribute to TrueAchievements as a news writer and reviewer. Usually, you can find me knee-deep in a multiplayer game while ignoring my growing backlog or on one forum or another discussing all things gaming.