This post will contain some light spoilers, but nothing that will ruin the plot. Just a few of the lesser-known or personal observations and hints that some players may not know.

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In No Particular Order Whatsoever

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• You can carry multiple o2 tanks and swap them on the fly! Just make sure they are full before you dive. o2 tanks are empty when created and only fill themselves while equipped. Great for wreck diving. Extra tanks slow swim speed slightly.

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• A single growbed of marblemelon is more than enough to provide all the food and water the player needs on a regular basis.
  

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• You can fit up to 6 growbeds on the Cyclops. You shouldn't. but you can. Seriously though, one is enough.
  

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• Want to find the Mountain or Floating Island? Go to the surface and look for the clouds on the surface that don't move. From the shallows the Mountain is the big one to the left of the Aurora, the floating island is smaller and in the opposite direction.
  

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• Don't build waterproof lockers, that's lost titanium you can never get back. Instead build a simple compartment and solar panel with your habitat builder and fill it with lockers. This should be a high priority in a new game.
  

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• If you wait long enough before visiting the Aurora you will get the message about the captain's cabin. Then you only have to visit the Aurora once while still playing "honestly", as long as you bring all the appropriate equipment.
  

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• The radiation from the Aurora spreads further over time and takes several days to vanish after repairing.
  

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• The Cyclops Shield shakes loose lava larva, hitting it once in awhile will greatly extend your battery life.
  

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• In the Aurora the Seamoth bay, Prawn bay, and Drive Core each have a vehicle module.
  

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• You can color code your wall-lockers by clicking the bottom "dot" while renaming them.
  

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• You do not need the Prawn suit. Nickel and Kyanite can both be found without drilling.
  

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• Don't take a stasis rifle and heat knife to the rear end of the Aurora and use them to murder Sammy. Seriously, you won't be nearly as terrified once you know you can kill those sons of beaches any time you please.
  

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• I'm just kidding. You should totally murder Sammy. Get revenge. Do it. Do it now.
  

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