Ultimate Defender is an achievement that is unlocked upon earning all achievements in the Quest for the Lost Eternia Shards DLC series. After being unlocked, the player gains access to the Tavern Basement when they visit their tavern and can get 80 more items in their Items Box. This achievement also unlocks the Ultimate Crystal Skin and the Tavernkeep Imposter Costume for the Barbarian.
For a detailed list of all required achievements, see Eternia Shards Campaign Achievements. Some examples are listed below:
- Portal Protector and Nightmare Portal Protector - Portal Defense
- Eternia Shard Recovered: Purple and Nightmare Eternia Shard Recovered: Purple - Mistymire Forest
- Djinn Recruiter and Nightmare Djinn Recruiter - War of the Djinn
- Eternia Shard Recovered: Blue and Nightmare Eternia Shard Recovered: Blue - Moraggo Desert Town
- Puzzle Solver and Nightmare Puzzle Solver - Riddle of the Deep
- Eternia Shard Recovered: Yellow and Nightmare Eternia Shard Recovered: Yellow - Aquanos
- Boss Crusher and Nightmare Boss Crusher - Boss Rush
- Eternia Shard Recovered: Red and Nightmare Eternia Shard Recovered: Red - Sky City
- Mythical Defender and Hardcore Mythical Defender - The Deeper Well to Glitterhelm Caverns
- Transcendent Challenge Champion - No Towers Allowed to Monster Fest
- Mythical Real Time Strategist - Except for the final wave, allow only Summoner minions to damage enemies on The Deeper Well through to Glitterhelm Caverns and City in the Cliffs.
- I've Got Monsters in My Pocket - All Campaign, Eternia Shards DLC and some Challenge and Achievement Reward familiars.
- Transcendent Survivalist - The Deeper Well to City in the Cliffs
- Playin' Cupid and Playin' Mythical Cupid - Sky O' Love
- Jingled All the Way - Etherian Holiday Extravaganza
- Legendary Defender
- Legendary Defender - Completed all original (non-DLC) achievements.