I'm afraid so. The game is lenient enough with its keys that you don't need to have a perfect run to have enough keys to get through those doors. Assuming you have gone back through the previous levels to make sure you haven't missed anything you'll probably need to restore to an earlier point if this is the case here are some tips:
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×Grabbing a certain accessory or weapon earlier might allow you to save some keys. For example you may be able to avoid opening as many doors down the central passageway in Rule 7 once you have the flippers or grappling hook.
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×Kill monsters and take damage in stead of opening a door to avoid them. In terms of score, 1 YK is worth 400HP so as a quick and easy rule, if the expected damage of a monster is less than 400, you shouldn't use a yellow key to avoid said monster, you should fight it instead. Note also, once you're stronger some monsters which previously cost a lot of HP to kill may become much cheaper and so just because at one point it is better to use a YK to avoid the monster doesn't mean this will always be the case.
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×There are areas of the hold where there are yellow doors which may help with traversal but ultimately you don't need to open. Try to spot these so that you don't waste a key on a door you didn't actually need to open.
Sorry I can't give more specifics than that but without knowing exactly what you've done it's hard to give more advice than the above. Best of luck!
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[Last edited by navithmastero at 01-24-2021 01:12 AM]
