In 1982, home computers were still a curiosity for most people, but for those who owned an Apple II, they represented the wild frontier of American game development. The industry would soon settle into commercial corporate structures and established business models. But for now, it thrived on curiosity and hobbyist programmers doing after-hours experiments, while local computer retailers often doubled as publishers. In the midst of late-night coding sessions and homegrown ingenuity, a game appeared, created by two programmers who would go on to pursue very different yet equally fascinating paths through the industry. The names in the credits were “Tom and Jerry.” Behind the pseudonym stood Bob Flanagan and Scott Miller. One was already a prolific Apple II developer, the other was destined to help redefine how PC games were distributed and sold.

Flanagan’s programming journey had begun years earlier, in the mid-1970s, when his school received a pair of 33 ASR teletype terminals connected to a remote computer via an acoustic phone modem. Armed with David H. Ahl’s hugely influential and best-selling book, 101 BASIC Computer Games, Flanagan spent hours typing, modifying, and improving BASIC programs, punching in listings on the teletypes, and saving the best on punched tape for later use. By 1979, things became a bit easier when he acquired his own Apple II, a fully assembled, ready-to-run home computer capable of loading and saving data on tape, or, for the lucky few, on “high capacity, high-speed” floppy disks.

Outside of people’s homes, video arcades were sweeping the country, and their influence quickly reached inside. Cabinets like Asteroids and Berzerk set new benchmarks for what games could achieve in both visuals and mechanics. For young programmers armed with a home computer, enough curiosity, and a copy of the machine’s technical manual, the arcade was equally part inspiration and challenge. Inspired to copy existing games as a personal challenge, testing how closely he could match the look and feel, he put his new Apple II through its paces.

Through his high school friend Harry Tarnoff, who worked at Programma International, the largest Apple II software publisher at the time, Flanagan connected with co-founder and president Dave Gordon. He landed a part-time job copying and labeling cassettes, assembling packaging, and readying the titles for distribution.

By 1979, while still in high school, Flanagan’s skills had matured enough for him to see his own Apple II games, Speedway, Sea Wolf, and Apple Alley being packed and shipped by Programma International.

As the decade turned, Flanagan enrolled at California State University, Northridge, all while Gordon and co-founder Mel Norell sold Programma International to Hayden Publishing. Gordon remained as Vice President and General Manager, but his larger-than-life personality soon clashed with Hayden’s executives, and he was let go in 1981.

That same fall, Gordon founded Datamost in Chatsworth, California. Meanwhile, Flanagan moved into assembly language, which allowed him to more faithfully capture the fast-paced mechanics of arcade games. The Apple II had never been designed for such experiences, lacking dedicated sprite chips, hardware scrolling, or sophisticated sound, but constraints often sparked ingenuity.

Flanagan was determined to bring the intensity and excitement of coin-op cabinets into people’s homes. With clever assembly routines, he was able to extract impressive performance from the 1 MHz processor. Soon, a steady stream of arcade-inspired titles, all marketed and distributed by Datamost. The titles helped the company establish a strong presence in the Apple II market, many became the era’s most popular hits, and Flanagan earned a reputation as one of the most prolific independent programmers on the platform.

Dave Gordon of Datamost (right) with Norm Baker at the 7th West Coast Computer Faire, March 19–21, 1982, in San Francisco.
Image published in Computer Gaming World, May 1982.

While attending California State University, Flanagan met fellow student Scott Miller, and the two quickly discovered a shared passion for programming. Collaboration came naturally to Flanagan. Unlike many early programmers who worked in isolation, he often involved friends and fellow developers in his projects, sharing ideas, testing mechanics, and making sure contributors received credit where it was due.

Growing up, Miller had been exposed to technical thinking early. He came from a household where computing and technology were essential parts of everyday life, with his father a NASA engineer who worked on the Apollo and Gemini space programs. In 1975, at 14, he was already writing computer programs on a Wang 2200 minicomputer while living in Australia.

Miller’s passion for computers continued when his family moved back to the United States. He would spend much of his youth programming text-based games on the Apple II, often in the computer lab with peers like George Broussard, who would later become his long-time collaborator. The two even spent time working in arcades together and took the experience back into their programming, engaging with the mechanics and culture of arcade games.

In 1981–82, Miller was assisting Flanagan on titles such as Pandora’s Box and Spectre, a Pac-Man-inspired game in which players navigated a three-dimensional maze. The partnership was informal but productive, with Miller contributing ideas, testing concepts, and occasionally writing code, complementing Flanagan’s technical expertise while helping shape the overall gameplay experience.

Flanagan’s Apple II titles, released between 1981 and 83 by Dave Gordon’s Datamost.
Many of Datamost’s games became best-sellers, including Flanagan’s titles.

Flanagan’s collaborative instincts stretched back even further. In 1979, he had helped his high school friend Bob Andrews with the game Death Race, while Andrews had assisted Flanagan on Sea Wolf. Now, by the early 1980s, Andrews was working with Continental Software, a small Los Angeles–based publisher founded by retailer James D. Sadlier.

Bob Flanagan’s Apple Alley side by side with Bob Andrews’ Death Race in a Programma International product listing.

Sadlier’s business included The Book Company and a ComputerLand store in Lawndale, California. The retail-publisher hybrid model was common in the Apple II era, when local stores stocked homegrown software alongside national hits. Distribution flowed not only through the store but through mail-order ads, magazine listings, and user-group newsletters.

Continental Software was looking to expand its product line, and Andrews persuaded Flanagan and Miller to develop a game to help fill it. Flanagan agreed, partly as a favor to Andrews. Without grand expectations, he and Miller began work on what would become Guardian. Like many early-1980s home computer games, the project drew heavily on the mechanics and design language of the arcades, along with elements from Flanagan’s earlier games. With Flanagan handling the bulk of the programming, Miller contributed code, tested ideas, and helped refine the gameplay. The result was a fast-paced maze shooter with its own twist and a small story to tell.

At the time, however, Flanagan was still closely associated with Datamost. Publishing through another label could have raised uncomfortable questions with the charismatic, if sometimes bombastic, Gordon. Rather than risk disrupting the relationship, Flanagan and Miller decided to credit the game to the pseudonymous duo “Tom and Jerry.”

Continental Software was a small operation. The company had released only a handful of titles, none of which had achieved major commercial success. Nevertheless, Continental was eager to present the new release professionally and reached out to Elise Rosenthal, who represented a number of freelance artists. Kim Passey did the beautiful cover artwork, while the 5.25-inch floppy disks were duplicated in-house. Continental Software published Guardian for the Apple II in the early summer of 1982,

Bob Flanagan’s and Scott Miller’s Guardian was published for the Apple II by L.A.-based Continental Software in 1982.
The beautiful cover art was created by freelance artist Kim Passey.

To avoid disrupting his professional relationship with Datamost founder Dave Gordon, Flanagan (and Miller) credited Guardian to the pseudonymous duo “Tom and Jerry.” 
“I didn’t want to hurt Dave,” Flanagan later told. He never learned whether Gordon discovered the game; if he did, he never mentioned it.
Gordon died on February 9, 1996, at the age of 54.

Guard the sacred Emerald of Syrinx by escaping six increasingly hostile levels, racing against time. Each defeated enemy causes the exit portal to shift to a different corner, forcing players to balance aggression with positioning. Clear the screen too quickly, and the level resets, but the timer does not. Tight controls and constant pressure give the game an unmistakably arcade-like intensity.
While copyright enforcement in games was still in its infancy, many of Guardian’s enemies were freely borrowed from well-known arcade titles such as Space Invaders, Pac-Man, and from Flanagan’s own Thief, published earlier by Datamost.

In a market saturated with arcade-inspired titles, standing out required both polish and intensity. Guardian delivered pretty much on both. While it wasn’t revolutionary, its shifting portal mechanic gave it a distinctive strategic twist within the multidirectional shooter concept. With Continental Software’s limited reach, however, the game never reached a wider audience. Flanagan estimates sales between 100 and 1.500 copies.

Coverage was sparse. Arcade Express, a bi-weekly electronic games newsletter published by Reese Publishing as a supplement to Electronic Games magazine, mentioned Guardian in its first issue, August 1982. It described the game as a generally fine, though flawed, maze shoot‑out in the same vein as Berzerk, awarding it a 6/10 — better than average.

Continental Software, despite its ambitious name, never became a household name in the industry, releasing only a handful of games, none of which achieved broad commercial success. Guardian never received the wider distribution or marketing push that might have brought it to a larger audience. The company’s most commercially successful product became The Home Accountant, a personal finance program that reportedly sold around 100,000 copies, far eclipsing the modest reach of the company’s game catalogue. After 1982, Continental Software ceased publishing games entirely.

Flanagan continued his work with Gordon and developed the visually impressive Space Ark, released for the Apple II in 1983, before transitioning into the wider game industry when he joined Atari in 1984. Here, he contributed to major arcade and console titles such as Paperboy, Marble Madness, and Gauntlet. In the 1990s, and again from 2003 to 2019, he worked at Electronic Arts, and today he is a programmer at Apple. While many early programmers drifted away as the industry professionalized, Flanagan’s career exemplifies the evolution from ” teenage bedroom coder” to seasoned developer, applying the skills and instincts earned on the Apple II to ever-increasingly sophisticated hardware over a span of more than 45 years.

Picture of Bob Flanagan, from the 1980s.
Image from: The Making Of Marble Madness with Bob Flanagan, Antstream.com

Miller, meanwhile, became one of the architects of PC shareware. In 1987, he founded Apogee Software, pioneering the episodic shareware distribution model that would reshape PC game economics. Under the Apogee and later 3D Realms banner, titles such as Commander Keen, Wolfenstein 3D, and Duke Nukem reached audiences that only he and Flanagan could have dreamed of back in 1982.

GameSpot recognized Miller as #14 in their ranking of the Most Influential People in Computer Gaming of All Time. In 1997, Computer Gaming World likewise placed him at #14 on its list of the Most Influential Figures in computer gaming, citing his creation of the Apogee episodic shareware model.

Scott Miller, working on his IBM PC in the 1980s.
Through Apogee, Miller helped empower independent developers and popularize a distribution strategy that bypassed traditional retail channels, a philosophy not unlike the grassroots Apple II scene he had participated in with Flanagan, years earlier.
Image from Scott Miller/X.

Thanks to Bob Flanagan for kindly taking the time to answer my questions.

Sources: Bob Flanagan, Internet Archive, MobyGames, Creative Computing, Wikipedia, Softalk, Arcade Express Vol. One, The Golden Age Arcade Historian, Computer Gaming World, GameSpot…