| Achievement | How to unlock
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- Are You Awake? (10 points)
| - Win an airlock battle without attacking.
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| - Collect one of each mix tape song.
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| - Hit Skullmageddon with a hair pick.
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| - Catch a boomerang thrown by your bro!
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| - View all pages of the concept art gallery.
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- Double Dragon (40 points)
| - Finish every stage cooperatively on Double Dragon difficulty with friendly fire enabled!
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| - Befriend everyone's most favoritest helpful character!
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| - Dodge and get the Gleam 50 times.
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| - Defeat 4 enemies with a single bat swing!
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- High Fidelity (10 points)
| - Max out a single song to level 50.
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- Is That a Quarter? (5 points)
| - Knock Williams into a pit.
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| - Expose the twin bulbs simultaneously.
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- Later Ro-bros! (20 points)
| - Beat every level as a Ro-bro.
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| - Max out every song to level 50!!
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| - Upgrade a song at the Tapesmith.
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- Misters Perfect (20 points)
| - Complete any level in co-op without taking any damage... with friendly fire enabled!
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| - Complete any level without taking any damage.
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- Pick a Winner! (15 points)
| - Nail all enemies with the hair pick.
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- Put Your Heads Together (5 points)
| - Grab two enemies at once!
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- Single Dragon (50 points)
| - Finish every stage solo on Double Dragon difficulty!
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- Skullmageddon's Curse (1 points)
| - Nyah ha ha! Now finish what you have started!
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- The Key to Victory (5 points)
| - Defeat an enemy by unlocking his potential.
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- This Channel Sucks (10 points)
| - Break all of the Skullmageddon monitors in the Rocket Dojo.
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| - Complete the game without using any Sosetsitsu!
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- Tossin' on Air (5 points)
| - Grab an enemy out of the air 10 times.
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- You Did What!? (10 points)
| - You got 50000 on Double Dragon!?
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