 Claim-Staker | Player VS Player / Battlegrounds | 10 |
 Clan Dreamcarver Style Master | Trials / Sanity's Edge | 50 |
 Clan Father | Housing / Property | 50 |
 Clan Mother Inaugurator | Quests / Aldmeri Dominion | 5 |
 Clanfriend | Morrowind / Quests | 15 |
| Class Master of the Second Era | Character / Class | 50 |
 Claw's Strike Explorer | Exploration / Aldmeri Dominion | 10 |
 Clean Freak | DLC Dungeons / Ruins of Mazzatun | 10 |
 Clean Pelt Harvester | Crafting / Clothier | 5 |
 Cleansing the Damned | Arenas / Blackrose Prison | 10 |
 Cliff Striders' Bane | Morrowind / General | 5 |
 Clinical Mortality | Trials / Sanity's Edge | 10 |
 Clockwork Citizen | Clockwork City / Quests | 10 |
 Clockwork City Adventurer | Clockwork City / Quests | 15 |
| Clockwork City Cave Delver | Clockwork City / Exploration | 10 |
 Clockwork City Grand Adventurer | Clockwork City / Quests | 50 |
 Clockwork City Larcenist | Clockwork City / General | 15 |
 Clockwork City Master Angler | Clockwork City / General | 5 |
| Clockwork City Master Explorer | Clockwork City / Exploration | 15 |
 Clockwork City Pathfinder | Clockwork City / Exploration | 10 |
 Clockwork City Skyshard Hunter | Clockwork City / General | 10 |
 Close Call Kill | Player VS Player / General | 10 |
 Closer of the Ever-Open Eye | Exploration / Dark Anchors | 10 |
 Closing the Book | Dungeons / Elden Hollow II | 50 |
 Cloudrest Conqueror | Trials / Cloudrest | 50 |
 Cloudrest Contender | Trials / Cloudrest | 50 |
| Cloudrest Savior | Trials / Cloudrest | 50 |
 Cloudrest Vanquisher | Trials / Cloudrest | 15 |
 Club Beginner | High Isle / Tales of Tribute | 5 |
 Club Contender | High Isle / Tales of Tribute | 10 |
 Club Phenom | High Isle / Tales of Tribute | 15 |
 Coin Withdrawal | High Isle / Tales of Tribute | 5 |
 Cold Potato | DLC Dungeons / Frostvault | 10 |
 Cold Pursuit | DLC Dungeons / Fang Lair | 10 |
 Cold-Blood, Warm Heart | Murkmire / Quests | 10 |
 Cold-Blooded Killer | DLC Dungeons / Icereach | 50 |
 Coldharbour Adventurer | Quests / Coldharbour | 50 |
 Coldharbour Angler | Exploration / Fishing | 5 |
| Coldharbour Cave Delver | Exploration / Coldharbour | 15 |
| Coldharbour Dom. Style Master | Trials / Ossein Cage | 50 |
| Coldharbour Master Explorer | Exploration / Coldharbour | 50 |
| Coldharbour Pathfinder | Exploration / Coldharbour | 5 |
| Coldharbour Skyshard Hunter | Character / Skyshards | 15 |
 Coldperch Cavern Explorer | Orsinium / Exploration | 5 |
| Coldrock Diggings Explorer | Exploration / Daggerfall Covenant | 10 |
| Coldsnap Style Master | DLC Dungeons / Frostvault | 50 |
 Collateral Damage | DLC Dungeons / Frostvault | 10 |
 Collecting Curiosities | Murkmire / Quests | 5 |
 Collective Bludgeoning | DLC Dungeons / Shipwright's Regret | 50 |
 Color Blind | DLC Dungeons / Depths of Malatar | 10 |