On My Mark

On My Mark is an Achievement in Halo 5: Guardians. This Achievement is obtained when two Elites are simultaneously assassinated in Blue Team Co-op.

v d e Achievements in Halo 5: Guardians

Campaign Completion	Into the Fire • Argent Moon • Glasslands • Roots of the Earth • Stolen Gauntlet • Escape • Together Again • Swords • Old Bones • Breakthrough • Stormbound • Civil War • Reclamation • A New Dawn • Sentinels • Legacy • Heroes Rise • Forging a Legend • Lone Wolf

Level-specific	Enemy of my Enemy • I Thought I'd Lost You • On My Mark • Going the Distance • Shoot from the Hip • Waiting on You • Maverick • Savior • Fire Drill • No Witnesses • Take a Hike • No Knock Raid • Preying Mantis • Emergency Boarding Procedures • Kraken Lackin' • Death From Above • Worms Don't Surf • Rolling Thunder • Tank Still Beats Everything • Harbinger • Prison Break • Double Stuff • Icy Cool

Co-op	One for All • All for One

Gameplay	My Rules • Your Team is Your Weapon • Your Style • Raise Your Banner • Make Your Mark • Gamemaster

Collectibles	Gravedigger • Gravelord • Conspiracy Theory • Hunt the Truth

Arena	Valor Recognized • Spartan Decimation • Flag Monger • Off to the Races • Castle Crasher • Benchwarmer

Warzone	Warlord • Cry Havoc • Top of the Food Chain • Bringing in the Big Guns • Go for the Gold

Score Attack	Drop A Quarter • Up For A Challenge • Party Hearty • The Hare • The Tortoise

Warzone Firefight	Not Your First Rodeo • Tour of Duty • Dangerous Game

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