• This guide contains spoilers. So I recommend finishing the game before following this guide.
  
• If there is anything wrong, misspelled or just a question, tell me in the comments and I will fix it.

Here I will include the achievements available in the base game.

In the High Energy Lab, there is a ball that you can slide. Slide it to open a window on the first floor. Next to the window (right) you will find square pieces with black and white holes. Put one a black and another white in the holes in front of the window. Then, launch the probe to the black hole, and before its enters there, remove any of the pieces you previously put there.
Apparently there is another way of unlocking this achievement. If at the end of the cycle you must be in the Ash Twin project. Then the nucleus will open revealing a black hole. Enter there, and you will start a new loop with a clone of yourself in the Ash Twin project. You can go there to talk with the clone if you want. The achievement will be unlocked as soon as that loop ends.

Just push the eject button in the right part of the controls.

Enter in the Sun Station without warping to it. Just with your spaceship. This is a difficult archievement to explain and obtain. So I'll just put a video:

Finish the game in one loop.
Here's a video of a speedrun guide:

Just after entering in your spaceship go as far as you can from the solar system, And wait until the loop ends.

There is a satellite orbiting the home planet. Sometimes when you are at the start of each loop you may see a white light in the sky moving very fast (Do not confuse with the orbital cannon, which is a blue light). All you have to do is to crash against it.
If for some reason the archievemenst doesn´t trigger. Flying close to it, locking on and matching velocity should work. Even though it doesn't deorbit.
Tip: In the small museum inside the tree you will see a screen that shows the photos of the satellite.

Make the training spaceship crash with the moon.

There are 3 ways of doing this:
-You have to enter in Giant's Deep's core without using cyclones. Go as fast as possible (10.000/12.000 m/s) and crash against the Giant's Deep's sea. You don't need to pass throught the electric barrier, just the current.
-Another way to obtain the archievement is this: Go to Brittle Hollow's Gravity Cannon and recall the ship. If you take the Nomai ship there it just sinks straight down to the core and you get the achievement as the ship drags you past the current. (Don't forget the far right slot for the Nomai Ship causes the ship to lose all momentum and face downwards towards the nearest planet).
- (This one apparently works better) The last method is to wait with your ship on Gabbro's island until it gets launched into space, and then land under the island while it's up in space and it will push you under the current.
Tip: This archievement is the hardest in the game, It may take you between 0.5-3 hours to unlock it.
Another important tip: Apparently capping your game to 30 fps makes the ship break through the current more easily.

You need to hear all the other explorer's music at once. To unlock it you will need to go as far as possible from the solar system while facing it. With the scope activated until all of them converge in a point. It is also obtainable in the endgame. When everyone is at the fire playing their instruments you can start moving back with the scope pointing at the center until the archievement pops up.
Pro-Tip: Do this with the sound activated to do the experience worth it.

Bring the forge core (the one in the mothership or in the Ember Twin) or black/white hole cores to the museum. The scrolls and projection tables won't work.

You will need to suffer and heal 1000 damage points and stay alive until the loop ends. My method is:

• Find a bonfire (I reccomend the one in the moon) park the spaceship near it. Make sure you have the space suit on.
  
• Go to the bonfire and step over it until the suits tells "Vitals critical".
  
• Step out.
  
• Repeat 13-18 times.
  
• Don't die until the end of the supernova.

Shoot your ship from a gravity cannon. In Ember twin, there is one. Land your ship in the centre of it. Then search for an U-structure with a slideable ball inside. Move the ball to the top of the long arm. The ship will go to space and you will unlock an archievent at the cost of that loop's ship.

At the start of the loop jump in the bonfire.

Roast and eat 10 marshmallows. Just introduce the marshmallows in the bonfire's flame, take them out, extinguish the fire, eat and repeat.

In this archievement you need to use a determined amount of oxygen as propulsion after depleting the fuel. It doesn't need to be done in one loop and it is not necessary to die.

Just send the the model ship to the sun or the Hollow's Lantern. You will know that it has arrived there when you lose control of the ship and you are unable to bring it back. I reccomend to send it to the sun, Hollow's lantern is almost impossible.

Fill all the entries in the game.
I would reccomend to follow this guide if you want to have a better view of what you are missing:
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2141589003
Anyway, here is a list with the number of entries for each location <3:

PURPLE
Gravity Cannon - 2
Tower of QT - 4
Tower of QK - 3
Quantum Shard - 3
Quantum Grove - 2
Quantum Caves - 2
Lakebed Caves - 3
Quantum Moon - 2
Quantum Shrine - 4
Sixth Location - 6
Solanum’s Shuttle - 2
Quantum Moon Locator - 3

ORANGE
White Hole Station - 4
High Energy Lab - 3
Ash Twin Tower Designs - 4
Statue Island - 2
Statue Workshop - 3
Sun Station - 4
Ash Twin Towers - 2
Black Hole Forge - 5
Nomai Mines - 3
Volcanic Testing Site - 3
Ash Twin Project - 5
Alignment Angle Diagram - 4

RED
Anglerfish Fossil - 3
Old Settlement - 4
Mural 1 - 1
Mural 2 - 1
Mural 3 - 1
Escape Pod 1 - 2
Escape Pod 2 - 2
Escape Pod 3 - 3
Nomai Grave - 4
The Vessel - 6

GREEN
Eye Signal Locator - 2
Southern Observatory - 4
Tornado Simulation - 2
Construction Yard - 3
Orbital Probe Cannon - 3
Control Mod - 2
Launch Mod - 3
Probe Tracking Mod - 4
Ocean Depths - 2
Bramble Island - 1
Feldspar’s Camp - 3
Frozen Jellyfish - 3

GREY
Northern Glacier - 2
Chert’s Camp - 5
Sunless City - 3
Hanging City - 4
Gabbro’s Island - 4 (2 of them are missable, so they are not necessary for the archievement)
Village - 3
Zero-G Cave - 2
Riebecks Camp - 2
Esker’s Camp - 1
Lunar Lookout - 1
Dark Bramble Seed - 3
Gravity Cannon - 2
Frozen Nomai Shuttle - 4
Ruptured Core - 4

Here are the DLC's archievements, I reccomend to finish the DLC and main game before proceeding.
Videos won't be avaliable until I find or record them.

You must break the Deep Space Satellite by against with it. Also, you don't need the DLC to unlock this one.

Get the lamp artifact that allows you to enter in the "dream world" and sleep in a normal campfire.

Use the raft to cross the Stranger under 90 seconds.

Surf the wave on a raft at for least 15 seconds.

Try using the second artifact prototype found in the lab to enter "dream world".

Cross the damm through one of the two grates found in the base.

Get crushed by an elevator on the "dream world".

Burn a slide reel in a campfire. (Nobody expects the spanish inquisiton)

Reach the 3 Forbidden Archives withouth being caught by the pursuers.




I recomend following this guide created by rat baby since it is specialized on how to unlock this archievement and will explain it better than I will ever do:
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2615013749

You need to be woken up from the "dream world" in 5 different ways in the same loop.




What worked for me was:

• Being burned alive.
  
• Swimming with the lamp.
  
• Getting caught with the lamp by a pursuer.
  
• Falling from a high place.
  
• Woken up by a bell.

Shoot the scouter to the artificial sun in the stranger. I reccomend trying it in a elevated place like the tower on cinder isles.

Find the golden poop. It is located on top of the main house in the Endless Canyon at "dream world". Which is accesible after turning off the house lights.

Escape the pursuers by jumping to your death, like water or from a high place.

Get your neck cracked by a pursuer. To do this you just need to be catched by one without your lantern.