John O'Neill (video game designer)

Board games and toys continued to be the main focus of Admcadiam's efforts for the next several years, and by 2005 O'Neill began to exhibit games at the American International Toy Fair. By 2009, the company's products had grown to include tarot and card games as well, including a card-game version of boardgames like Paradice.

In 2001, inspired by his daughter Oona, O'Neill returned to game design with the artisanal board game Paradice. Released by O'Neill's See Through Games, Paradice was the first offering under O'Neill's new project, Game Whys: Art and Philosophy Games for an Emerging Humanity. The environmentally-oriented game was released in standard (wooden pieces) and deluxe (resin materials) formats and is intended to be as much an art piece as a game.

The final project under development by Flyghts of Fancie before it was shut down to allow O'Neill to pursue a television deal with Time–Life (as well as the production of video discs and satellite networking) was a collaboration with cartoonist Gahan Wilson. The game was to be titled Gahan Wilson's House of Horrors, and the title was to be financed by Electronic Arts, however it was cancelled prior to release and would not be completed until nearly a decade later in 1993 as The Ultimate Haunted House.

In 1982, during his time working for Atari, O'Neill also began a side project with close friend and Atari product manager Stuart Rosen under a newly created video game branch of Admacadiam called Flyghts of Fancie. This project, originally called simply Life, would eventually become O'Neill's first independent game, the critically acclaimed art game, Lifespan. Fitting with Admacadiam's goal of making art accessible for the masses, the central consideration for Flyghts of Fancie would be the player's experience including aesthetic enjoyment as well as reflective thought leading to meaningful personal insights. Unlike the vast majority of contemporary video games that emphasised frenetic action, violence, and the collection of points, Lifespan was a slow-paced and surrealistic pastiche of five episodes that led the player through events representative of the human experience from childhood to death. The game was distributed by the Chicago-based Roklan Corporation, receiving a favourable critical response and it was compared to contemporary art game, Moondust, by writers including its designer Jaron Lanier.

John O'Neill grew up in Northern England and began to experiment with painting at a young age. His interest in art continued throughout the 1960s, his academic career eventually leading him to study art at the Bath School of Art and Design and at London's Chelsea College of Art and Design where he would exhibit his work publicly. O'Neill's approach to art in his 20s was experimental in nature and he explored diverse media including painting, sculpture, and music. His experiences in exhibiting his work in London in 1971 at the age of 23, however, led him to make dramatic changes in the interest of gaining as broad an audience as possible. Turning to consumer channels (mass publication and broadcasting) in 1975, O'Neill developed a philosophy he called "Admcadiam" that was geared toward outreach to the general public and he formed Admacadiam – a company striving to serve as a "creative catalyst" in producing art for the masses. Alongside his work at Admacadiam, O'Neill would continue to display gallery art corresponding to his "Admcadiam" philosophy, and he also moonlighted as a guest lecturer at universities and art institutes.

John O'Neill (born 1948) is a British artist and video game designer best known for developing the games Lifespan and The Dolphin's Rune. He is one of the earliest art game designers, and his work has been compared to that of contemporary game designer, Jaron Lanier.