Milestone Games has revived the classic Screamer franchise. With the first new game in over 30 years the studio has brought some action packed racing to modern consoles and PC. That of course comes with achievements! With this guide we will help you earn the “Hiroshi’s Mastery” achievement for using his Unstable Boost move 100 times.
Of all the mastery achievements in Screamer, Hiroshi’s is likely the easiest to obtain. You can head to the arcade and select any of the modes and get his done in a handful of races.
Because of how easy it is you can combine it with whatever else you might be working on. I did mine while working on unlocking the Pure racing achievement for completing a score challenge with a Green Reapers character.
How To Complete
Once you’ve selected whatever race you want to do and have selected Hiroshi you can start the race. Now all you need to do is build up your sync bar to get a full bar of boost by manually shifting.
With a full bar of boost you can now activate it by holding down the button. Once your car is in its boost you will see a button prompt for LB pop up in the middle of the screen near the end of the boost.

Clicking LB before the QTE expires will give you another small boost and 1% towards your achievement. Simply rinse and repeat 99 more times and Hiroshi’s Mastery achievement is yours.
We hope this guide helped you on your journey towards the 100% completion of Screamer. Check below for all our other Screamer related guides.
More Screamer Guides
- How To Find The Hidden Shortcut in The Tournament
- How To Grind Mastery Achievements
- Ultimate Driving Achievement Guide
- Smooth Race Achievement Guide