Create
49 Achievements
1,000
30-35h
Grand Design
Solved a Contraption-o-Matic Challenge with a contraption built of 40 or more parts
10
How to unlock the Grand Design achievement in Create - Definitive Guide
Since your goal is to use as few parts as possible to earn the most sparks, you probably won’t get this one in the course of normal game play. Simply go to a contraption-o-Matic challenge that allows you to use at least 40 parts and add 40 parts, but it still has to work and solve the challenge.
I recommend replaying one you have solved before (your previous solutions are saved by auto save) and simply add more parts as long as they don’t stop it from working.
The 40 parts do not have to belong to one large contraption. Load up any Contraption challenge that gives you 40 or more pieces and construct a vehicle/device that will solve the challenge (you can also just load a completed challenge and start from here). Now, go somewhere out of the way and place all of your remaining parts into one big mess that won't interfere with the challenge objects. Start the challenge and upon completion you will receive the achievement.