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Crossing Reach the summit with a companion and return to the beginning.

Reflection Sit and meditate with another player for more than 20 seconds.

Freeflow Bronze Achieve 8 medals on combat challenges

Spiky Personality - Kill a Helghast using a Burster Killed a Helghast by shooting a Burster plant

Athena, Out Rescued Athena

Braaaaaaaaaaaaains! Completed the "Braaaaaaaaaaaaains!" mission

ISA TV - Establish communications Made contact with Earth

Mirage Find the hidden desert flower.

Cagefighter - Kill 10 Helghast using Brutal Melee Killed 10 Helghast using Brutal Melee

Ding! Overleveled Reached Level 51

Into The Lair - Reach the cable car Reached the cable car and gained access to Stahl Arms South

Jail Break - Liberate Narville Liberated Narville from Stahl Arms South

Speed Kills Destroyed a Lancer while in a Racer

Go Down And Stay Down - Destroy the ATAC Defeated the ATAC outside the Stahl Arms facility

Turn The Tables - Melee Kill a Capture Trooper Killed a Capture Trooper using melee

You Drive - Drive the Mobile Factory Took over the controls of the Mobile Factory

Bring It Down - Defeat the MAWLR Defeated the MAWLR defending the Space Elevator

Explore Discover all cloth creatures in the desert.

Predator Gold Achieve 24 medals on predator challenges

Freeflow Perfection Perform a perfect combo including all of Batman's combat moves (any play mode)

Let's Go Home - Destroy Stahl's Cruiser Destroyed Stahl's Cruiser and left the planet on any difficulty

Ancestors Find a mysterious creature hidden in the temple.

Evening The Odds - Kill 500 Helghast Killed 500 Helghast

Depot Demolition Destroyed Lance Depot

Knoxx-Trap Killed General Knoxx-trap

Steele-Trap Killed Commandant Steele-trap

Ned-Trap Killed Dr. Ned-trap

Muerte la robo-lución Killed the Interplanetary Ninja Assassin Claptrap

Threshold Cross the broken bridge without completely rebuilding it.

Communication is Key Ecco: Talk to another dolphin

Quick Exit - Escape the Oil Rig quickly Got off the 2nd Rig within 2 minutes.

Freeflow Silver Achieve 16 medals on combat challenges

Don't Die Alien Storm: Reach Mission 3 without losing a life

True Ninja Skills Shinobi III: Complete first level without using continues

Full Exploration You unlocked all the islands.

Transcendence Collect all unique glowing symbols across one or more journeys.

Stealing Points Bonanza Brothers: Reach 40,000 points on the first level

Taste Like Tuna Ecco: The Tides of Time: Eat 200 fish

Saved by Magic Golden Axe III: Use magic 10 times

Close Quarters Killer - Kill 25 Helghast using Brutal Melee Killed 25 Helghast using Brutal Melee

City Dweller Made it to the city in Regular or Hardcore difficulty.

It's so realistic! Collected 5 3D glasses

Excessive Force - Kill a lone Helghast with the WASP secondary fire Used the secondary fire function of the WASP launcher to kill a single Helghast

History Uncover all 10 ancient glyphs.

Three Times a Charm Streets of Rage: Complete 1st Level using all 3 characters

Lots of Zeros Sonic Spinball: Get 10,000,000 points in the first level

Companion Finish the game with the same partner for the majority of the journey and return to the beginning.

Tower Up Golden Axe II: Complete Tower Level

Complete Chaos Sonic The Hedgehog: Obtain a Chaos Emerald

Impossible Trinity You completed the mission "Museum Piece".