| It's just so frustrating that I have to start over every time I fall.
This achievement is rather difficult and is considered quite hard. Due to its hard difficulty, the number of power cells is higher than most achievements. Infinite Mode level achievements are not affected by this and they still keep their 25-75 power cell rewards.
A True Engineer is an achievement in Run 3.
As you can see from the requirement, you have to use the Angel to earn this achievement. Although not many players have the bought the Angel due to his somewhat expensive price, here are some tips on how to earn this achievement. Try to jump normally without using the dash from platform to platform. At the beginning of the level, there are 2 platforms in front of each other to begin with. Then there are platforms on the sides of the tunnel. Because the platforms are small, only 3 tiles long, it's kind of tricky to land exactly on them. When there are huge gaps, try and jump towards the side of the tunnel so that the Angel will spin outside the tunnel and slowly go upwards, but don't go too far or you'll end up falling upwards since the tunnel is only 3 tiles long on each side so it is smaller than it appears to be. When jumping across platforms normally, try and skip one whole platform since the Angel isn't that slow, but only when the platforms are just one tile apart from each other. Save your dash until the very end of the level and you should be able to earn this achievement.
If this description doesn't make sense to you, check out the walkthrough video below on this page.
Achievement Walkthrough Edit
Note: Since this achievement is hard to earn, please excuse the first 9 deaths I made. I would've done less if the recording wasn't so glitchy. You can just skip to the last 20 seconds of this video to see the actual guide.