PLATFORM ADVENTURE
Zillion (SMS, 1987)
Subgenre: Puzzle Platformer (similar to Impossible Mission)/ARPG-lite (basic character building: HP, jump height, attack power - collect Opa-Opa symbols to level up), ​Basic stealth (alarms triggering enemy attacks which can be seen with the scope/x-ray glasses)
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Movement Mechanics: High jump (via leveling up or rescuing Apple)
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Other: Escape sequence after the final boss​
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Can rescue and play as two other chars though their abilities can also be attained by the main char by leveling up (allowing for two sequence breaks), Can switch between chars on the fly
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Partially non-linear structure (can skip rescuing the others and get some upgrades in any order)
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Basic map (shows basic layout, main computer location, player location, explored rooms)
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Teleport via the computer terminals (to the surface elevator or to the nearest elevator)
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No save or password save
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Can descend faster at elevator shafts by making the elevator move upwards with jumps (glitch)
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Influenced by: Impossible Mission, Metroid, possibly Zelda II, Brain Breaker, Cosmo Police Galivan (NES), Metal Gear, Xanadu or Romancia
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Influenced: Possibly Cyborg Hunter, Bionic Commando (NES)