Hello guys !
Here's my video to show you how to obtain the Racing achievement:
Chapter 4:
You just have to be 1st and reach the throne room before the Sentinels.
The achievement will pop in the throne room.If you want you can still go backward to collect some items after getting this cheevo :)
Don't hesitate to like and to comment my guide if you have any questions,thanks a lot !
Have fun !