Callin' in the Big Guns

Callin' in the Big Guns is an achievement in Halo 4.^[1] It is obtained by earning ordnance three times in one game while playing on a Majestic Map Pack map in matchmaking

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↑ Halo Waypoint - Halo 4 Majestic Map Pack Achievements

v d e Achievements in Halo 4

Campaign Completion	Dawn • Requiem • Forerunner • Infinity • Reclaimer • Shutdown • Composer • Midnight • Wake Up, John • I Need a Hero • The Legend of 117 • Lone Wolf Legend • Skullduggery • Bropocalypse • Bromageddon

Terminals	Contact the Domain • Terminus

Level-specific	Digging up the Past • Midnight Launch • This is my Rifle, this is my Gun • Bros to the Close • Mortardom • Explore the Floor • Give Him the Stick • Chief, Smash!

Experience	Not Some Recruit Anymore • Movin' on Up

Spartan Ops	Operation Completion • A Legendary Episode • Dedicated to Crimson • Crimson Alone • Roses vs Violets • No One Left Behind • Knight in White Assassination • What Power Outage? • No Easy Way Out

War Games	I <3 Red vs Blue • Hanging on the Combat Deck • The Challenged • The Challenger • Armorer • Badge • PWND • What a Poser! • The Cartographer • Game Changer • Snapshot! • The Director • Sharing is Caring

Crimson map pack	Now They Fly? • Size Is Everything • ODST • Bigfoot • David and Goliath • Clay Pigeon • Special Delivery • Pump Yer Brakes

Majestic map pack	Callin' in the Big Guns • I Thrust at Thee • Didn't See It Comin' • Bird of Prey • Bullet Sponge • I See You! • Clever Girl • Flash of Light • Last Man Grinning • Pigs Can Fly

Castle map pack	What is Yours is Also Mine • Dodge This! • Hello Nurse! • That Won't Save You • Ashes to Ashes • Beating up the Beat • Sight Seeing • Scrapyard • Outta My Way!

Champions Bundle	Shocking • Got It! • Protect This House • Hat Trick • From Downtown • Can't Catch Me • Just a Scratch • Pitchin' a Tent • One Man Army • Repeat Survivor

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