As might be expected, Keys are used to open locks. Keys typically only open one door; once that door has been accessed, the key has no further use.
Appearances
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Blaster Master
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Fred guards the Key needed to access Area 5.
Blaster Master: Enemy Below
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A key is needed to access each boss chamber.
Blaster Master Zero
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As in the original game, the Key needed to get to Area 5 is guarded in the depths of Area 4 by Ribbiroll. This key unlocks both a shortcut back to the top of Area 4 and the exit access to Area 5.
Additional Keys being necessary to access boss chambers is revisited towards the end of the game: Key 2 is guarded by Antibody Cell in Area 8, immediately due west of the shutter it unlocks on the path to the Mutant Lord. Keys 3, 4, and 5 are hidden throughout Area 9, required to open a triple shutter blocking off the game's final setpiece.
Blaster Master | |
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Areas | 1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 |
Upgrades | Hyper · Crusher · Hover · Key · Dive · Wall1 · Wall2 |
Subweapons | Gun · Grenade · Homing Missile · Multi-Warhead Missile · Thunder Break |
Bosses | Mother Brain · Crabullus · Photophage · Fred · Hard Shell · Frozen Crabullus · Enhanced Fred · Plutonium Boss · Underworld Lord |
Other Topics | Pause Trick · Worlds of Power: Blaster Master · Blaster Master (Comic) · Blaster Master: Destination Fred |
Blaster Master Zero | |
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Areas | 1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 · 9 |
Upgrades | Mobility: Hover Pack/Jump Booster · Dive Gear · Wall Climb · Keys Cannon: Hyper Beam · Crusher Beam · Laser Shot · Maximum Shot · Cannon Shot · Acceleration Blast |
Subweapons | Warhead Missiles · Thunder Breaker · Homing Missile · Spark Tackle · Shield Mine |
Bosses | Top-Down: Mother Brain · Drap Trappers · Crabularva · Crabullus · Photophage · Spark Salamander · Gurnahide · Hard Shell · Remote Blaster · Ancient Freeze · Venom Master · Antibody Cell · Underworld Lord/Multidimensional Lord Side-Scrolling: Central Gear · Ribbiroll · Skeleton Boss · Invem Sophia |
Characters | Main Game: Jason Frudnick · Fred · Eve Sophia Models: 3rd · Zero |