The "Steeplechaser" achievement can easily be missed and would require you to replay the whole game in order to get the achievement.

OR you can simply download the save file I backed up

If you want to download and use my save file follow these steps:

1) Download the save file I'm hosting on googledrive here : https://drive.google.com/drive/folders/1ZC223uayX_HU2MVZLcdauGQM_RN1a3R5?usp=sharing
NOTE the game only handles 1 save file so back up your own one if you want to continue on with that save after doing this

2) Open the following directory on your computer, and replace the save files with the ones downloaded through the link above.

Windows :
DRIVETHATTHEGAMEISON:\SteamLibrary\steamapps\common\BE-A Walker\Profile

Once you have loaded the save file simply walk through the level and be sure to not step on any of the natives.