A new interactive experience based on Fool Me Twice.

You’re the rich girl Kayla Ferrule - And your birthday is in a week. Unbeknownst to you, Miles Hector, your friend, got in with some bad apples, and they are coming after you! Can you outsmart both him and his mobster friends and make it to your 20th safe and sound?

Test your instincts in this brief interactive adventure based on Yellow Optic’s Fool Me Twice.

Available now

Interactive software is compatible with Mac, PC, and Linux systems.*

The Plot

To celebrate your 20th birthday, your friend Miles Hector invited you out to enjoy some quality time together. Your trusty butler Luna Syracuse is a little weary of you out of the safety of the Ferrule Mansion, and sure enough, a few mobsters managed to run into you. They surely have some designs on a high-value target, and Miles claimed he tried to keep them at bay for you.

Look into your decision-making skills, and choose the best course of action. Every single decision you make will help you celebrate your birthday with all the bells and whistles and avoid capture by some unscrupulous people.

A distillation of the central storyline from Fool Me Twice, take control of Kayla’s destiny and give her the life-saving hand she was too spoiled to develop herself.

What say your instincts?


Original High-Quality Art

The same highly-detailed, vibrant, and rich 2.5D art by Nenetlitzi that graced the teaser art now graces the full story. Enjoy every single scene in crisp 1080p, which is powered by originals that are 7x larger for ultimate sharpness. Every single sprite and background is examined to the sub-pixel level, so visual perfection is guaranteed.

Original Story

Fool Me Twice defined the starting point of Yellow Optic. Conceived in 2015 as a text-based novel, it has been remastered and redistilled into a visual form that is both edge-of-your-seat while beautiful to look at. The same writer that penned the original novel re-adapted the tale for a new medium, so the every bit of vision is as present as ever.

Supports Indie Artists

Ferrule Instincts was brought to life with the help of indie artist Pia “Nenetlitzi” Coppins. A portion of sales from every single purchase of Ferrule Instincts will go towards the artist. It’s not just a great experience for you, but also incredibly meaningful for the Yellow Optic team behind it.

Light On Your Wallet, Light On Your Machine

Yellow Optic was founded on the idea that stories should be fun, and it should not come at the expense of the reader. Enjoy an uncompromising experience at an affordable price everyone will enjoy. And it’s ultra-lightweight package (smaller than 1 GB) means you can easily carry an extra Yellow Optic story with you alongside your already-huge library.

Compatible With Everything

Because Ferrule Instincts is based off of the Ren’py Engine — the same engine that powers many other popular and bestselling titles — you can guarantee that the app will sing on your processor, no matter how budget-conscious you may be. Windows, Mac*, and Linux users can all play the same title, 32- or 64-bit all supported!

Continuous Support

Just because it’s small and compatible doesn’t mean we’ll let it just sit there! We are continuously working on updates to brighten up the game, so the next time you start up Ferrule Instincts, you may find surprises that cause you to love it even more.

Ferrule Instincts

One purchase provides a license across all devices signed into the same Steam account.**

*Mac devices require an Intel processor to run Ferrule Instincts natively. Apple silicon models will run Ferrule Instincts, however it’ll require macOS’ built-in Rosetta 2 or a virtual emulation environment.

**Your purchase of Yellow Optic Interactive Software sold on Steam is subject to the Steam Subscriber Agreement. Click here to view the terms offered by Steam.


Experience Ferrule Instincts in its original, quintessential form.

The one that started it all and inspired Fool Me Twice, the original novel delves much deeper and gives a far more comprehensive picture of the world Kayla, Luna, and Miles navigated through.

The original is just as worth a look as ever.