| Achievement | How to unlock
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| A Boo Boo | Knock Abobo into a pit.
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| A Foot Face? | Become the hidden idol!
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| Are You Awake? | Win an airlock battle without attacking.
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| Audiophile | Collect one of each mix tape song.
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| Bone to Pick | Hit Skullmageddon with a hair pick.
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| Bro-merang | Catch a boomerang thrown by your bro!
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| Cultured | View all pages of the concept art gallery.
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| Double Dragon | Finish every stage cooperatively on Double Dragon difficulty with friendly fire enabled!
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| Fuzzface!! | Befriend everyone's most favoritest helpful character!
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| Gleam On! | Dodge and get the Gleam 50 times.
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| Grand Slam! | Defeat 4 enemies with a single bat swing!
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| High Fidelity | Max out a single song to level 50.
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| Is That a Quarter? | Knock Williams into a pit.
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| Jawsome!!! | Expose the twin bulbs simultaneously.
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| Later Ro-bros! | Beat every level as a Ro-bro.
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| Max Fidelity | Max out every song to level 50!!
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| Metal Head | Upgrade a song at the Tapesmith.
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| Misters Perfect | Complete any level in co-op without taking any damage... with friendly fire enabled!
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| Mr. Perfect | Complete any level without taking any damage.
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| Pick a Winner! | Nail all enemies with the hair pick.
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| Put Your Heads Together | Grab two enemies at once!
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| Single Dragon | Finish every stage solo on Double Dragon difficulty!
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| The Key to Victory | Defeat an enemy by unlocking his potential.
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| This Channel Sucks | Break all of the Skullmageddon monitors in the Rocket Dojo.
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| Tone Deaf | Complete the game without using any Sosetsitsu!
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| Tossin' on Air | Grab an enemy out of the air 10 times.
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| Victory! | Defeat Skullmageddon!
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| Weapon Master | Use every weapon once.
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| You Did What!? | You got 50000 on Double Dragon!?
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