This is a tutorial on how to complete the sb_omen_v2 map, for confused players.

WARNING: This guide spoils a fair bit of the map.

Edit: 4/2/18
I've been informed of the correct planet names, and the guide has been updated accordingly.

Now, let's begin.
You're probably reading this because you're confused, and don't know what to do. Fear not, for I am here with a guide on how to complete this map!
Note: The slot parts may be inaccurate, but simply move each artifact to each slot until it locks in place.

PART I: ARTIFACTS
There are four artifacts scattered throughout this map, and each one is pivotal to the ending. This segment will help you to obtain each one.

1. Mercury
Mercury is above Earth in this, and could be technically classified as the highest planet. To reach this one, use a flying vehicle, or noclip. Either one works, as for some reason, rocket boots "rocket" you back to Earth.
Once you've landed on Mercury, locate the indentation on the ground that appears to be out of place, and hit it with a crowbar a few times. The Mercury Artifact should be revealed. Bring it back to Earth, then place it in the Red slot.

2. Uranus
Uranus is one of the distant planets, so use your preferred flight method to reach it. Once you arrive, turn on a flashlight and lantern, then submerge yourself. The Uranus Artifact is in a snowy underwater area. Once you locate it, bring it back to Earth, and place it in the Blue slot.

3. Jupiter
Jupiter is the largest planet, and also one of the hardest to access. Noclip is recommended for this planet.
Once you arrive at Jupiter, locating the Jupiter Artifact requires searching each large rock until you locate it. It should be in a small cavity. Like the other two, bring it back to Earth when you locate it, and place it in the White slot.

4. Mars
Mars, the Red Planet, and the hardest artifact to obtain if you're unprepared. Bring plenty of S.L.A.M.s.
Again, use your preferred method of transportation to reach Mars. Once you arrive, locate the Temple. It should be near the edge of the planet, in a cave.
Once you arrive in the temple, bring one of the movable rocks from the right side of the entryway to the button on the left, through the hole. Drop the rock onto the button, then head through the newly-formed central entryway. This is where things get tricky.

4.1.
Head to the left passageway, and once you locate the parkour course, simply parkour over, grab the pyramid, and parkour back with it. Set it in the central room, and pull out your S.L.A.M.s.

4.2.
Drop S.L.A.M.s as you traverse to the room with the gravestone. This will prevent you from getting lost on the way to retrieve the pyramids. Once you arrive, scatter several S.L.A.M.s throughout the room.

4.3.
Traverse back, but don't go for the central room. Take a detour, and head for the other corridor instead. In the circle corridor's entryway, drop another S.L.A.M. Grab the pyramid there, and locate your dropped S.L.A.M. Pass it, then follow your trail to the gravesite, placing the pyramid on any pedestal.

4.4.
Follow your trail back to the central room, grab the pyramid, then traverse back to the gravesite, putting the pyramid on the other altar. Wait for the stairs to form, then travel down them.

5.
Grab the Mars Artifact at the back of the room, then toss it into the corridor. When the ungodly screech of the awakened zombies finishes, detonate your S.L.A.M.s. This should eliminate a good portion of them. For the ones that haven't been killed, pull out your weapon of choice, then begin attacking them while you bring the artifact through the temple.
Until you reach the entryway, alternate between attacking the zombies, clearing a path, and bringing the artifact closer to the exit.

6.
Once you reach the exit, pick up the artifact, then bring it out of the cavern, and to Earth. Place it on the Brown slot.

If all Artifacts were placed correctly, there should be a short cutscene. When it ends, there should be some sort of rays floating around the large device, and a beam shooting off the top of it.


PART II: GETTING THE ENDING
After the previous steps are completed, follow the beam of light up to the now-usable device above Earth. Step into the portal, then once you can move again, step forwards, towards the only visible object. Once you're pulled closer, you should see a sign, and the map's logo. A white doorway should open.

Congratulations! You've completed the map! You can step into the white doorway to return to the main map.

I hope this guide was helpful for anyone who got confused!