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Jonathan David Blow (born 1971) is an American video game designer and programmer. He is best known for his work on the independent video games Braid (2008) and The Witness (2016). Blow became interested in game programming while at middle school. He studied computer science and English at the University of California, Berkeley, but dropped out to start a game company. After the company closed following the dot-com crash, Blow worked as a game development contractor. He co-founded the Experimental Gameplay Workshop and wrote a monthly technical column for Game Developer magazine.
Blow gained prominence in 2008 with Braid. He used its financial success to fund his next game, The Witness, and formed a company called Thekla Inc. After a lengthy development period, The Witness was released in 2016, and like Braid was critically and financially successful. During its development, Blow became frustrated with C++, the programming language Thekla used to create the game. He began designing and creating a new programming language. Full-time work on the language, code-named Jai, and a new game implemented in it began after the release of The Witness. A compiler for the Jai language is currently in beta release.
Blow's games are known for being artistic and challenging. They are made with custom , and have larger budgets and longer development times than most independently funded games. Blow was featured in , and is known for his strong opinions about the gaming industry.
In 1989, Blow attended UC Berkeley as an undergraduate, double-majoring in computer science and English. He started as a physics major but switched to computer science because he "just felt called in that direction". He was a member and president of the Computer Science Undergraduate Association, as well as the eXperimental Computing Facility, an undergraduate computer-interest organization. During college, Blow wrote some science fiction, which he published under a pseudonym. He spent five years at UC Berkeley but dropped out with less than one semester to go. He said; "I was really depressed about being at school, I didn't like it. I didn't have a good time."
At its height, Bolt-Action Software had 14 employees. It folded in 2000 due to the dot-com crash. In a 2020 interview, Blow said he was convinced 1996 was the most difficult time in history to start a video game company because of the transition from 2D to 3D titles. A number of components of the game were challenging to implement, but Blow learned from the experience—he said; "we went broke, and I was burned out for several years after that from working hard ... but that's how I became a good programmer".
During this time, Blow moved to New York City, where he was introduced to an IBM research project about servers based on cell processors. Blow pitched them a proof of concept of a physics-intensive, online, multiplayer game about giant robots attacking a town. Blow and Atman Binstock did most of the programming for the game; Blow wrote the client-side code, graphics, and gameplay, while Binstock wrote the physics engine to run on the server from scratch. After submitting their final report to IBM, the team took the game to Electronic Arts, who Blow said were not impressed.
Blow's other contract work included particle effect programming on Flow on the Sony PlayStation 3; code review following MTV's purchase of Harmonix; and programming on the music-action iPod game Phase. Blow said of this part of his life; "I was just stumbling forward like people do sometimes, and doing the best that I knew how to do, which at that time was programming".
In mid-2007, Blow signed with Microsoft to release Braid via its distribution platform XBLA. Blow felt time spent meeting the XBLA certification process would have been better spent polishing the game, but he noted Microsoft was "very hands-off" with game design, and that "the final game is exactly what I wanted to put there". Blow estimated he spent more than $180,000 of his own money to develop Braid. Braid was released in August 2008 to universal acclaim, was "an immediate sensation", and made Blow a millionaire. Braid was one of the earliest indie games to grace seventh-generation consoles.
In 2010, Blow co-founded funding organization Indie Fund together with some other successful independent game developers. Blow appeared in the documentary film , in which he discusses his experiences developing and releasing Braid. In 2014 Blow stated sales of Braid had earned more than $4 million, which he used to fund The Witness (2016).
Work on The Witness began in 2008. Blow created prototypes of several game ideas before choosing the one he liked the most, despite it being a 3D game which he "absolutely didn't want to do". Throughout development, Blow hired developers full-time and founded the company Thekla, Inc., of which he is president. The Witness was revealed to the public in 2010, when three people were working full-time on the game. Blow hoped to release The Witness in 2013 as a launch title for the Sony PlayStation 4, but the goal passed as the scope of the game increased. By 2015, the core team had grown to eight. At the time, it was very rare for a small, independent game studio to spend more than seven years on a game.
The game was released on Windows and the PlayStation 4 in January 2016. Blow reported that the first week sales revenue of The Witness totaled over US$5 million, and was one of the top downloads on illegal BitTorrent websites. The game received critical acclaim, several BAFTA and Game Developers Choice Awards nominations, and appeared on 'Best of the decade' features from IGN, Polygon, NME, CNET, and National Post.
In 2014, Blow began designing the language, which is codenamed Jai, and started creating a compiler for it. The first year and a half of work on Jai was part-time because Thekla was shipping The Witness. In mid-2016, he began full-time work on the language, a game engine written in Jai, and Order of the Sinking Star. In 2023, Blow described the game as "the biggest single-player puzzle game that anybody's ever made", and estimated that it will take 250 hours to complete at a "normal pace", and more than 500 hours for completionists.
Among other things, Blow hopes the language will improve the experience of game programming and allow programmers to build more functionality with less code. By working on the Order of the Sinking Star, its engine, and Jai at the same time, Blow is able to test the language's design and adjust it early in its lifetime. , the Jai compiler is in a beta release.
In August 2020, Thekla announced Braid, Anniversary Edition, a remastered edition of Braid. Blow said the remaster will be faithful to the original, saying Braid will not get any "Greedo shoots first" changes (a reference to a change made to Star Wars). The game was to include more than 15 hours of developer's commentary. Thekla originally planned to launch the game in early 2021, but it was pushed back, and eventually released on May 14, 2024 for multiple platforms. Blow was frustrated with the weak reception to the launch, saying Anniversary Edition "sold like dogshit" and that Thekla could not afford to pay any of its employees to work on the Jai compiler.
Blow's games are known for being artistic, challenging, and not following industry trends. In a retrospective on Braid, GQ noted the game was released at a time when the market was dominated by violent and repetitive first-person shooters, yet "made an earnest effort to make an artistic statement" that went beyond this trend. The puzzles of Braid have been described as "tough" and "formidable". Time described The Witness as "categorically defiant", and described its reception as being "widely quantified as a game created by a genius for geniuses".
Blow's games have higher budgets and longer development times than most independently funded games, and have custom game engines. Braid was built with a relatively large budget for independent games at the time, while The Witness—which was largely funded with the profits of Braid—cost close to six million dollars. The development times for Braid and The Witness were very rare for independent games at the time. Blow created a custom game engine for both games, which in the case of The Witness took a large amount of development time. He noted that when development of The Witness began, off-the-shelf engines such as Unity and Unreal Engine were not sufficiently capable to build the game. Blow also noted that he tries to make games that stand the test of time, so owning his own engine means he can continue to provide the game to people in contrast to off-the-shelf engines that come with no such guarantee. Braid artist David Hellman said Blow was not stressed about time or budget, and that for him "the game always came first."
Blow said when he makes a game, he tries to make something he would want to play and be interested in. He wants to understand the world from many perspectives, and tries to uncover and understand truths about the universe through game design. Blow enjoys exploring the permutations of a simple idea. He described an ideal player of his games as someone who "is inquisitive and likes to be treated as an intelligent person". Blow hopes the design skills he developed by working on complicated games have made Jai better designed than most languages.
Blow founded Thekla because he wanted creative freedom rather than out of aspiration to run a company. He used almost all of the profits of Braid to independently fund The Witness, noting that by doing so he had total creative freedom and thereby would not have to adjust the game to please the whims of a publisher. The team that worked on The Witness said Blow gave them a lot of autonomy when working on the game. Blow does not schedule development time for games at Thekla, noting; "we don't do it like Electronic Arts. We don't pick a quarter and ship the game. We're just trying to make the best game."
Blow thinks there are individual elements of storytelling that work well in games, including mood, character and setting; but considers games to be a terrible medium for storytelling in general. As of 2016, he considered the quality of storytelling in games to be significantly lower than that in literature. In 2018, he said many contemporary games include designs that are self-sabotaging and weaken the structure of the game they are in, despite such designs existing nearly a decade earlier, indicating stalled progress in the medium. He does not consider to be inherently unethical, but thinks many games made for phones are "just pretending to be games in order to have a microtransaction button or show ads". He considers social network games evil, and noted while SimCity and FarmVille appear superficially similar, SimCity is a creative activity that involves problem solving while FarmVille is about retaining the player's attention for as long as possible.
According to Blow, games have the potential to have a much-bigger role culturally and help define the human condition. While Blow strives to make his games meaningful, he has noted games with relatively empty gameplay, such as massively multiplayer online games (MMOs) which keep players hooked with fake rewards, may be causing real harm to people.
Despite being seen as a role model for independent development, Blow is uncomfortable with being described as an indie developer: he feels the indie game scene has changed into something in which he does not belong. In 2019, he said the independent development scene had changed in that it was easier to make and release a game than ever before, but that in terms of game-design "progress has not been as large as people assume". Blow noted Stephen's Sausage Roll, a game he thought in 2017 "may be the best puzzle of all time", was rarely discussed in development circles, indicating a stagnation of the development scene. The comments attracted social-media attention, which Blow found troubling, noting; "The job isn't to be in a community; the job is to make a good game."
Blow considers much of current software to be of low quality. He noted in a 2020 interview "I think we're now in a situation where everybody in the world is flooded with low quality software, and everybody wishes that they had higher quality software." He considers most of what programmers currently do to be wasteful, describing programming in 2021 as dealing with unnecessary complexity. He has a low opinion of modern C++, describing it in 2020 as a terrible language, and was partly motivated to create Jai in order to improve the quality of life for programmers.
In December of 2025, game developer Alan Hazelden, who licensed two of his own games for use in Order Of The Sinking Star, made a statement against Blow regarding his political views. Two other developers from the same project, Sean Barrett and Jonah Ostroff, also echoed the statements made by Hazelden on social media.
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