Perform a Level 3 Super with Ratchet on 'Metropolis'
Found all the golden keys in the Forsaken Ruins.
Collect all 35 secret keys in stage one through seven
Found all the golden keys in the Ancient Pyramid.
Collect all 15 secret keys in stage eight through ten
Collect 100 keys.
Unlock half the doors in the Art Gallery.
Collect all of the Muse Keys
Complete all Manhattan and Helicarrier challenges
Complete the word "key"
A boy has just confessed to you!
Opened 50 doors.
Get your first golden key.
Get your first silver key.
Or at least the front door.
Add 100 entries to the Keyword Log, then view your Collection
Kicked the can a total of 50 times
Kick 20 Horronyms without dying.
Complete the Spike Room Box Puzzle
Kill 20 zombies in a row using only slide-kick attacks
Complete the game on Hard difficulty
Collect all Dream Squids in Friends to the End.
Use the Forge to apply at least one upgrade to every weapon.
Kidnapped by Mr. Yomawari
Completed Episode 13.
Get the pistol.
View Kihan's ending event.
Kill a Cyclops
Kill a Minotaur
Clear challenge 'Kill Collector 1'
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