Lone Planet: 100% Guide

In the achievements section I wrote a partial walkthrough through them as well. Not every single step is listed if it’s an obvious one such as a quest given by an NPC or platforming.
Pressing F12 quits the game, so be if you want to take a screenshot!

Tips for Corso: Don’t change your marbles into dyed spots right away. Remember you can cause a chain reaction by changing a marble right next to another regardless of if it’s your own or your opponent’s marble.

Existence
Be born.
Start the game and sit through the opening animation until you can play.

Jetpack
Get a prize for your help.
Follow the starry path to the left into the dark green area and reach the planet with a “rocket”.
Talk to the person to the left of the “rocket”.
Talk to the three other people on the planet and pass their tests.
From left to right:
Test 1
Question 1: How many houses are there in the city? Answer: 4
Question 2: How many spiked balls did you encounter coming here? Answer: 4
Question 3: How many stars are there in our galaxy? Answer: 100 billion
Test 2
Question: Are you an alien? Answer: No
Test 3
Question: Do aliens like cotton candy? Answer: What is cotton candy?

In the black and white area follow the path to the right and up into the green cloud area.
Talk to the big mushroom, then find the three small mushrooms before returning to the big mushroom.

In the black and white area follow the path to the right and down into the blue and red area.
Deactivate two red tower constructs, then talk to the big red construct.

Now return to the dark green area and talk to the person to the left of the “rocket” again.

Singularity
Survive general relativity.
Return to your birth planet and head to the right again. Double-Jump into the galaxy and again in the white void.

Champion
Win the Great Corso Tournament.
At the crossroads head to the right and down into the pink stripped area.

Learn how to play Corso and sign up for the tournament.
Start the first round.
Play the second round right away.
Get ready to play the last round, it’s not too tough so long as you remember the marble chain reaction!

Legend
Beat all Corso players and savor the melody of victory.
Missable. You can challenge all three of these players after the tournament.

Before starting the tournament you can already talk to the two researchers on the middle planet to challenge them to a match of Corso each.
After winning the tournament head down and right past the small fast orbiting planet and challenge the final opponent one more time to a game of 3-player Corso.

Energetic
Open the gate, providing enough energy.
At the crossroads head right into the purple area.

At the end of the area is a maze you have to go through, which the symbols around the planets just before it are a hint towards.
Maze: down-right-right-down-down-right-right-left-left-left-down-left-left-up
Get the key stone and return to the crossroads.

In the pink stripped area head further in after winning the Corso tournament through the newly opened path back into the blue and red area.
Head through the blue and red area back into the first black and white area and then left into the dark green area and interact with the rocket.
After talking to the oracle return to the person by the rocket to obtain a key stone.

Head back into the blue and red area. There is a key stone hidden in this area as well as a pair of glasses.

At the crossroads head up and left into the yellowish area.
Find the escaped creature for the last keystone.

With all four keystones head back to the crossroads and talk to the golem. Open the gate.

Noise
Beat the game.
Self-explanatory. Beat the final boss. During the last phase with all of the small planets moving around you just have to survive.