Project Spark

Easiest method I've found for this game?
1. Create mode, select sculpt, select plateau. Scale small, intensity high, shape whatever.
2. Elastic band pulling right trigger.
3. Elastic band pulling the left stick forward.
4. Get a long, small, high intensity plateau going.
5. Keep tabs on it (there is a world limit), and do other things.

Doing this for any of them will also net you XP towards your Spark Level.

Or you could use sculpt, paint, or biome in a legitimate project. Up to you.

EASIEST SOLUTION YET!!!!

ALL YOU NEED IS A PLAY AND CHARGE CABLE!!!!

Simply go into a new creation. I did start from scratch.

Go to ''sculpt'' then select ''add'' on the left hand side menu bar.

Use a rubber band around the left trigger AND a rubber band on the right trigger.

Leave to idle for as long as possible or as long as needed with the cable powering the joypad. This way you will bag the ''ADD TERRAIN'', ''SUBTRACT TERRAIN'' and the ''SCULPTING SERVANT'' milestones.

this is how I acquired mine as using a rubber band, Also, my world would time out and crash doing it via ''Kaelse" guide.

Hope it helps!

EDIT: 16/06/2016
Some people have messaged me saying that the joypad still turns it self off even if you have a play and charge kit and you rubber band both triggers.

It's worth noting that to stop this happening, you simply place a third rubber band around both thumb sticks to pull them together on an angle. You will see "dirt" spawning and the curser will spin around in a circle from doing this as it causes this edit tool to stay on the map and not fly out into the abyss. I have tested this several times and can confirm that it works. This is a massively handy as it helps you get your Tier 4 achievement for sculpting.

UPDATE AS PER PHUCKJUNKIE COMMENT: 18/06/2016

For Tier 4 you need 90 minutes of sculpting. There is also an achievement on the PC for Tier 5, which will require 4 hours. Of course, you can always leave it overnight and keep adding XP to help get you to level 50 until it's maxed out.

Go in yours profile under challenges.
Select Milestones, and you will see 3 challenges named as:

1) Biome Mastery
2) Painting Pro
3) Sculpting Savant

You need to bring only one of this challenges form level Tier 1 to level Tier 5
For doing that you need to use the appropriate tools in creation mode.

I suggest you to choose Sculpting Savant challeng for the achievement, is easier

(But you still have to reach at least Tier 1 with other challengs for the achievement "complete all 1 Tier Milestonse" so maybe try all of three and choose the one you prefer)

How to use the tools.
In Main Menu Select Create, then start create mode.
Following the istructions and build a flat empty world. Other options is up to you. When the world is created, press start and choose edit.
Then press A and moving left stick up - down you can choose SCULPT or PAINT or BIOME.

Whatever you choose, you need to press RT while moving around the world to create, or LT for Erase what you just created.

Form BIOME is better use River than Nature.

From PAINT press A, press D-pad UP and choose a color and press B to return in the world.

From SCULP you can choose any of the option, I use a lot expand, add and plateau.
The others are not so good for the achievements.

If you keep press LB with Left stick you can choose and modify Scale - Shape - Intensity.
Press X or Y to fix Y-axis

If you keep press RB you can fix the zoom.

Is up to you if use elastic band to speed up the process. Or to play few minute every day, since there are a lot of daily challenge that will require you to use one of this tools in creation mode.