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Useless Trinkets Completed the "Digging up the Past" side quest.

Two's Company, Four's a Party Complete any Adventure level with 4 players.

Ending E Achieved "Surprise!" ending.

A Clean Bill of Health Have a single character affected by all status ailments (both beneficial and detrimental).

Don't make me pull the trigger! Survive for 5 minutes in Demolition mode

That Party was Ace Ace every Adventure level in The Journey Home.

Nightwing Revenge Obtain 78 medals on the original Arkham City and Nightwing Bundle Pack ranked maps (as Nightwing)

Robin Revenge Obtain 78 medals on the original Arkham City and Robin Bundle Pack ranked maps (as Robin)

Burning times Complete a level on Master difficulty without using bombs, overdrive or boost with a custom ship

Rain Maker Collected all trophies.

Sack the Postman Post all 6 invitations for the party.

Campaign Nightwing Obtain 114 medals on the original Arkham City and Nightwing Bundle Pack campaigns (as Nightwing)

Campaign Wonder Obtain 114 medals on the original Arkham City and Robin Bundle Pack campaigns (as Robin)

Can You Feel that Shield Power? Complete "Homebase Storm Shield Defense 6"

Let it Snow Receive the Extreme Environment Suit (XE Suit)

Bloodlust Defeat 10000 enemies.

Become a Superhero Complete "Hero Training - Stage 2"

Drilling for Justice Assemble the cryonucleation tunneller - the cryodrill

Launch the Rocket Complete all the Main Quests in Stonewood

Flipper Flip the level 6 times in Protector mode

Collector Extraordinaire Collect 100% of the Prize Bubbles in The Journey Home.

Stalact-tactician Takedown 2 enemies with one stalactite

Need a sentry here! Unlock the Mechanic form

For Auld Lang Syne Stop Freeze and bring Boyle to justice

Boosted! Hold Super Boost for 15 seconds in Protector mode

Walk the Plank! Complete "Plankerton Storm Shield Defense 1"

Snowjob Get 3 enemies frozen in one attack

Down with the Revolution Stop Anarky thug operations in South Gotham

Two Swirls Complete "Two Swirls"

Part car, part plane Jump 500 meters or more 100 times

Survivor Specialist Complete "Survivor Training - Stage 2"

Darwin Rewards Complete "Weapon/Trap Evolution"

Save the last humans Lifetime total of 1,000 humans saved in Survival mode

Master Wayne Take no damage when playing as Bruce Wayne

Canyon Blue clear Complete all Blue Canyon maps (Any medal)

Ray.README Complete "Ray.README"

Bee yourself Unlock the Killer Bee form

Don't leave me! Destroy 10 consecutive Sentinels before they escape in Survival mode

50 down, I don't know how many to go Complete 50 feats

Heroes of Gaia Collect all trophies.

Breaking the Ice Free all civilians frozen in cryogenic ice

From Beyond Memorize Seven Sigils at Once

NAVDML Complete Mefitis on Veteran difficulty with a custom ship, with every ability set to zero

Job's done! Reach S-Rank on the Mechanic

Memory Memorize a Sigil

The True Bee-ing Reach S-Rank on the Killer Bee

Live to die another day Survive to see the dawn of the 5th day in Survival mode

Wow, I'm Inside! Complete "Six Minutes"

Come Out of the Cold Perform 3 ice wall takedowns

The Shadow Out of Time Craft an Item Using Eldarium