Stray Speedrun Savefile  

Save file for the speedrun achievement.

Download it and copy it to the directory:

"C:\Users\<your username>\AppData\Local\Hk_project\Saved\SaveGames\<string of numbers>\Slots\Slot_1"

For example, mine is "C:\Users\xxx\AppData\Local\Hk_project\Saved\SaveGames\76561198720311502\Slots\Slot_1". 

You can also change the slot by editing the last folder to Slot_2 or 3.

Open steam and disable autosave.

Now open the game and choose the slot in which you pasted Data.save file and click continue, it will land you to the last checkpoint of the game and just go straight out into the city, 
and after the last cutscene you will get the achievement. (only take 30s)
Credits to "Echo the Neko" for the save game file.