Here’s my notes on this. I saw different posts covering parts of this, but I want to try and capture them all here for some traveler out there.

Before you End the Expedition:

• Note that you’ve accumulated a lot of quicksilver currency. You can use this at the vendor near the floating mission computer to unlock cool stuff. Quicksilver is the hardest currency to find, so you don’t want to waste it. Any items you unlock with Quicksilver, can be reclaimed at the same vendor freely on any other save file.
• Note that each tier of the Omega expedition has an optional achievement for scanning aliens, minerals, and plants on each Rendezvous planet. If you missed these and want to finish them and you can’t remember where those planets are, don’t worry, all you need to do is visit the portal in a space station and view the previous space stations you’ve visited. You’ll notice that some of these will have extra text on them like (Rendezvous #1). That will take you to the star where the Rendezvous planet is. Look for a lot of bases which are the purple icons you see on the planet surface from space. That should get you on the right planet.

And now assuming you really are ready to finish:

• Did you transfer important tech upgrades from your suit/multitool/ship?
  • Then make sure you transfer it back. Your main save does not have them now. You need to send them back!
• Transfer any other items back that you want to keep. If you’re new to New Man’s Sky, I’d suggest keeping rare eggs you received, Good S-Class upgrades you need, and especially any upgrade modules for your freighter (like +1 inventory to freighter, because freighter stuff is hard to find.
• When you arrive back in your main save, anything you stored back in the Expedition terminal on the Anomaly will be waiting for you, kind of like a locker.

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Having finished the expedition (and watched the questions in this forum) here’s a handy FAQ!

General tips

• Read all the tasks – they don’t have to be done in order. Some of them you can get out of the way early on. (scanning flora / fauna, learning words, pictures of different environments..)
• At every space station, especially in the rendevous systems, scroll through all the other bases. Some of them will have super helpful names like “Airless photo op” or “Sunken Freighter here” or a list of available resources.
• Most of the time it’s better to not be in multi-player mode – that will mean that resources others have gathered, beings in stations that have been talked to, ships that have been found – all these will still be available to you, where they probably won’t be in multi-player. However, whenever you visit the Anomaly it is nice to be in multi-player.
• You can craft ammo out of ferrite. Super helpful for those pesky sentinels. Speaking of Sentinels, you can tunnel underground or dive into the water to escape them. Usually.
• Once you go through the back hole, immediately go to the space station in that system and use the station teleporter to get back to your base or the previous system. Do NOT try to warp back to the 3rd rendevous, it will just make you frustrated.
• The very first system you spawned in on has a planet that will work for the hot planet pic.
• If you are reading this on Feb 19, Tier 5 community research isn’t done yet. If you want the rewards for that, don’t complete the expedition until that is done.

What do I take with me?

• If you are a new player, not to worry! you will be able to collect what you need. Also look for other bases that are offering things (see tips above) The rest of this guide is for folks who aren’t starting a new save for the expedition.
• If you have a main save, and want to bring stuff over – here are some things to consider.
  • Basic building blocks: 9999 stacks of carbon, ferrite, sodium, oxygen, chromatic metal, silver, tritium, di-hydrogen, ect
  • Special items: things to claim an interceptor (inverted mirror), things to make liquid explosive (acid, unstable gel), cadmium, salt
  • Things to make or save money: wiring looms, salvaged data, exosuit inventory modules, runaway mold or tainted metal to make nanites, high ticket items to sell (hot ice, floral samples, stasis pods, ect.)
  • Tech row: eh. not as helpful as you’d think, especially if you are bringing over things for nanites and selling. You could drop some S class stuff here for the exosuit? but especially if you plan to “buy” a copy of your multi-tool and ship, those should already be tricked out.
  • In general, the items and upgrades you really need to complete the tasks will be given to you or will be possible to obtain. For instance you start out with a portable refiner. Don’t buy the special star warp upgrades from the Anomaly – you’ll get them as a reward.

What can I take back?

• All the expedition rewards will be available from the quicksilver booth in the anomaly on any save.
• If you transferred from your main, you can use the same storage system to send stuff back (like companion eggs, other stuff you’ve collected that’s hard or expensive to get, resources if you want to)
• Here I found the tech slots much more useful, taking back upgrades for use on other starships/multitools.
• You will be able to buy back the ship you are in and the primary multi-tool you are carrying, so if you brought stuff over from your main, make sure you are back in them going back. You’ll be able to claim the reward ship and atlas staff at the quicksilver station.
• Yeah, for real, you can only take back one ship and one multi-tool. so be sure the ones you want are the ones equipped.

What about my money / nanites / bases?

Ok – disclaimer. I haven’t actually completed the expedition yet, I’m waiting for the Tier 5 community research to complete. So I don’t know FOR SURE about this, but here’s what I’ve read.

• Your bases will be available from your main.
• Some of the stuff you didn’t take back with you will be converted into units and nanites.
• Anything you buy with quicksilver on the expedition will also be available to claim on the main.
• if someone who has completed the expedition wants to chime in with what happened to their units/nanites/quicksilver, that would be much appreciated!

Anything else interlopers? Feel free to chime in with tips or ask questions in the comments!