Cave Story Plus Boss Attack mode
Successfully complete the game with the best ending to unlock Boss Attack mode.
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Curly mode
Get Curly’s panties to unlock Curly mode.
Nemesis Challenge
Get the Nemesis weapon to unlock the Nemesis Challenge.
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Sanctuary Time Attack mode
Successfully complete the game with the best ending to unlock Sanctuary Time Attack mode.
Wind Fortress
Successfully complete the game with the best ending to unlock the Wind Fortress.
Alternate title screen
Successfully complete Sanctuary Time Attack mode within the indicated time limit to unlock the corresponding title screen music and character pointer:
- Running Hell music and Curly pointer: 6 minutes
- Safety music and Sue pointer: 3 minutes
- Toroko’s Theme music and Toroko pointer: 5 minutes
- White music and King pointer: 4 minutes
Steam achievements
Successfully complete the indicated task to unlock the corresponding achievement. To view your achievements and stats in Steam, select “Community”, “My profile”, “View all my games”, then the game and view stats.
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- <3: Obtained the Life Pot!
- A Fine Blade: Obtained the Blade!
- A Gift from Santa: Obtained the Fireball!
- Arm Bar: Obtained the Arms Barrier!
- Armored Feline: Defeated monster x!
- Ate A Red Flower: Defeated toroko….
- Big Fish: Defeated ironhead!
- Boss Attack A Rank: Completed Boss Attack in Less Than 10:00.
- Boss Attack B Rank: Completed Boss Attack in Less Than 12:00.
- Boss Attack C Rank: Completed Boss Attack in Less Than 15:00.
- Boss Attack S Rank: Completed Boss Attack in Less Than 8:00.
- Cave Story Clone: Defeated g-clone!
- Cold Hearted Snake: Obtained the Snake!
- Count to 290: Obtained the 290 Counter!
- Coward: Bad ending.
- Curse Broken: Best ending.
- Doggy Style: Beat Omega with Jenka’s Puppy.
- Don’t Get Lost: Obtained the Map System!
- Ducking Awesome: Obtained the Nemesis!
- Evil to the Core: Defeated the Undead Core!
- Fish Preserve: Spared eggfish.
- Freakin’ Laser Beamz: Obtained the Spur!
- Ghost in the Clinic: Defeated puu black!
- Girly Gun: Obtained the Machine Gun!
- Happy Birthday Pixel!: Played Cave Story on April 29th!
- Hate Made Flesh: Defeated ballos!
- Heart of the Island: Defeated the Core!
- Heavy Medal: Defeated the Red Ogre!
- Here’s Johnny!: Obtained the Alien Medal!
- Home, Sweet Home: Returned Mister Little back home.
- House Call: Defeated the Doctor!
- Huge Toad: Defeated balfrog!
- I Like It Hard!: Completed hard mode.
- I’m Juggernaut…: Found and collected all Life Capsules.
- I’ve Got Your Back: Obtained the Iron Bond!
- Kings of Power: Accumulated XX,XXX of damage.
- Ladies’ Man: Obtained chako’s lip stick!
- Little Man: Found mister little!
- Machine Monster: Defeated omega!
- Magic Missile: Obtained the Missile Launcher!
- Merry Holiday Happy Euphemism: For the rest of us!
- Mimiga Bodyguard: Defeated curly….
- Mimiga Hero: Mask mimiga ending.
- Miserable: Defeated misery!
- Mr. Clean: Obtained the Bubbline!
- Muscle, MD.: Defeated the Muscle Doctor!
- Only If You’re Greedy…: Defeated the Twin Dragons!
- Panty Raider: Obtained curly’s panties!
- Pea Shooter: Obtained the Polar Star!
- Rabid Mimiga: Defeated igor!
- Return the Favor: Saved curly brace.
- Rock Bustin’: Defeated balrog, yet again….
- Sanctuary A Rank: Completed Blood Stained Sanctuary in Less Than 4:00.
- Sanctuary B Rank: Completed Blood Stained Sanctuary in Less Than 5:00.
- Sanctuary C Rank: Completed Blood Stained Sanctuary in Less Than 6:00.
- Sanctuary S Rank: Completed Blood Stained Sanctuary in Less Than 3:00.
- Shtuff Happens: Normal ending.
- So easy, so so easy!: Completed easy mode.
- Supa Star!: Obtained the Whimsical Star!
- Super, thanks for asking!: Obtained the Super Missile Launcher!
- Swollen Mech: Defeated heavy press!
- To Hell and Back: Completed blood stained sanctuary.
- Toroko Wins!: Beat by Toroko.
- Tow Me A Rope: Obtained the Tow Rope!
- Turbocharged!: Obtained the Turbocharge!
- Unstoppable: No life capsules (best ending).
- Untouchable: No life capsules (good ending).
- Wanna Fight?: Defeated balrog!
- Weapons of Mass Destruction: Found and collected all Missile upgrades.
- What A Fun Guy!: Obtained ma pignon!
- What Are YOU?!?: Defeated balrog, again….
- Who’s the Boss?: Completed boss attack.
- Wind Fortress A Rank: Completed Wind Fortress in Less Than 5:00.
- Wind Fortress B Rank: Completed Wind Fortress in Less Than 6:00.
- Wind Fortress C Rank: Completed Wind Fortress in Less Than 7:00.
- Wind Fortress S Rank: Completed Wind Fortress in Less Than 2:00.