 Missed Me by That Much | Arenas / Vateshran Hollows | 10 |
 Missing Map Recovered | DLC Dungeons / Scrivener's Hall | 10 |
 Mist Walker | DLC Dungeons / March of Sacrifices | 5 |
| Mnemic Egg Guardian | Quests / Ebonheart Pact | 5 |
 Mobar Mine Explorer | Exploration / Aldmeri Dominion | 10 |
| Molavar Explorer | Exploration / Craglorn | 10 |
 Molten Measures | Infinite Archive / Exploration | 15 |
 Molten Warrior | High Isle / Volcanic Vents | 10 |
| Monomyth Reforged | Solstice / Antiquities | 15 |
| Monsoon Marauder | Exploration / Aldmeri Dominion | 5 |
 Monster Hunter of the Month | Orsinium / Quests | 15 |
 Monster Mercenary | Infinite Archive / Exploration | 15 |
 Monstrous Component Collector | Character / Trophies | 10 |
 Moon Hunter Keep Challenger | DLC Dungeons / Moon Hunter Keep | 50 |
 Moon Hunter Keep Conqueror | DLC Dungeons / Moon Hunter Keep | 10 |
 Moon Hunter Keep Vanquisher | DLC Dungeons / Moon Hunter Keep | 10 |
 Moongrave Fane Challenger | DLC Dungeons / Moongrave Fane | 50 |
 Moongrave Fane Conqueror | DLC Dungeons / Moongrave Fane | 10 |
 Moongrave Fane Vanquisher | DLC Dungeons / Moongrave Fane | 10 |
 Moongrave Style Master | DLC Dungeons / Moongrave Fane | 50 |
| Moonlit Cove Explorer | Dragonhold / Exploration | 5 |
 Moonwalker | Elsweyr / Quests | 10 |
 Mora's Onslaught | Infinite Archive / Exploration | 15 |
 Mora's Whispers | High Isle / Antiquities | 15 |
| Morag Tong Style Master | Morrowind / General | 50 |
 More Than You Can Chew | Holiday Events / Jester's Festival | 10 |
 More the Merrier | Trials / Cloudrest | 50 |
 Mornard Mercenary | Firesong / Quests | 10 |
| Morrowind Cave Delver | Morrowind / Exploration | 15 |
 Morrowind Grand Adventurer | Morrowind / Quests | 50 |
 Morrowind Master Angler | Morrowind / General | 5 |
| Morrowind Master Explorer | Morrowind / Exploration | 15 |
 Morrowind Pathfinder | Morrowind / Exploration | 10 |
 Most Admired | Blackwood / Exploration | 10 |
 Most Valuable Combatant | Player VS Player / Battlegrounds | 10 |
| Most Victorious | Trials / Ossein Cage | 10 |
 Mother of the Empire | Gold Road / Tales of Tribute | 10 |
 Mountain Flower | Crafting / Alchemy | 5 |
 Mountain God | DLC Dungeons / Scalecaller Peak | 50 |
 Mountain Skyshard Hunter | Character / Skyshards | 5 |
 Mournhold Lich Destroyer | Exploration / Dark Anchors | 10 |
 Mouth for the Mouthless | Necrom / Quests | 10 |
| Mtharnaz Explorer | Exploration / Craglorn | 10 |
| Muck Valley Cavern Explorer | Exploration / Cyrodiil | 10 |
 Mud Ball Miscreant | Holiday Events / New Life Festival | 5 |
 Mudcrab Chitin | Crafting / Alchemy | 5 |
 Mummy King Murderer | Exploration / Daggerfall Covenant | 5 |
 Mummy Lord Murderer | Exploration / Ebonheart Pact | 5 |
 Mundane Rune Harvester | Crafting / Enchanting | 5 |
 Mural Mender | Elsweyr / General | 50 |