Casey Muratori

Casey Muratori (born 1976) is an American computer programmer and game developer. He is known for his work on Bink Video At Hecker's startup, Muratori worked with Hecker, Jon Blossom, and Jon Ross on a game that did not ship. Muratori then worked at Gas Powered Games for a while before moving on to RAD Game Tools. Muratori worked for about five years at RAD Game Tools (now part of Epic Games, having been acquired in 2021), a company developing middleware for the video game industry. At RAD Game Tools, Muratori initially worked on Larrabee. Bink has been used in over 15,000 games as of 2012. For a time, he hosted a forum to discuss the subject. Besides immediate mode GUIs, he also developed the -way linear quaternion blend and the first geometric optimizations for the Gilbert–Johnson–Keerthi (GJK) algorithm. At Molly Rocket he spent 3.5 years as the sole developer of a video game, Sushi Bar Samurai, "a game about making sushi for ghosts caught between worlds". A demo of the game was playable at PAX 2008. Muratori decided not to release the game because "t doesn't really communicate anything."

Muratori published a novel, The Technician, in 2011. He planned to release another novel, Three Stars, in 2012, but the book was never published.

From around 2012 to 2016, Muratori worked on Jonathan Blow's video game The Witness, where he rewrote the movement system (in particular, working on collision detection systems)

In 2014, Muratori began a video series entitled Handmade Hero, whose goal was to show the creation of an entire video game from scratch. The videos were live-streamed on Twitch and archives were uploaded to YouTube. As of 2025, the series has over 660 episodes, each one 13 hours long. Muratori also held conferences called HandmadeCon.

In 2020, Muratori announced an upcoming programming course focused on "fundamentals that apply to all programs in all languages" called Star Code Galaxy. As of 2025, Star Code Galaxy has not been released.

He has spoken at various conferences including a keynote talk, "Digital Due Process", at FUTO's Don't Be Evil Summit in 2024, and the Better Software Conference 2025.

Personal life

As of 2025, Muratori resides in Seattle, Washington.

From 2008 to 2020, Muratori co-hosted a podcast called the Jeff and Casey Show with RAD Game Tools founder Jeff Roberts.

He composes music on the piano.

Works

Video games

Year Title Role 2016 The Witness Additional contributions in programming

Books

Year Title Role 2011 The Technician Author 2020 Meow the Infinite Author and/or illustrator 2022 Meow the Infinite: Book Two Author and/or illustrator