The Compact Disc-Interactive (CD-I) is a type of digital disc used to store data and a hardware system developed by Philips, a company from the Netherlands, and Sony, a company from Japan. It was created to build on the Compact Disc Digital Audio (CDDA) and CD-ROM formats, as described in the Green Book specifications, which were also developed by Philips and Sony. The system was designed to store and display audio, text, and images together. Philips and Sony hoped the CD-I would be used in education, stores, and home entertainment, but it is most well-known today for its video games.

CD-I discs are the same size as regular CDs but can hold up to 744 MB of data, including up to 72 minutes of moving video. CD-I players were typically separate devices that connected to a television. Some systems included built-in CD-I televisions or added parts for personal computers. Most players were made by Philips, but other companies, like Sony, used the format and sold their own CD-I players under the name "Intelligent Discman." Unlike CD-ROM drives, CD-I players had their own computers inside, using a special microprocessor called the Motorola 68000 and an operating system named CD-RTOS, which stands for "Compact Disc–Real Time Operating System."

CD-I discs contained video games, educational and entertainment programs, and reference materials such as interactive encyclopedias and museum tours, which were popular before the internet was widely available. They also included business software. Philips added internet features to its CD-I system, such as web browsing, sending emails, and online gaming. The goal was to provide an affordable way for people to access interactive multimedia content, combining the functions of a CD player and a game console.

Tools to create CD-I content were first released in 1988. The first CD-I player for home use, called the CDI 910/205, was introduced in late 1991 and cost about $1,000 (equivalent to $2,364 in 2025). It could play interactive CD-I discs, audio CDs, CD+G (CDs with graphics), Photo CDs, and Video CDs (VCDs), though VCDs required an optional card to decode video. At first, the system was marketed as a "home entertainment system," and later as a "gaming platform." However, it did not gain enough popularity and was mostly stopped by Philips in 1996. Some companies continued to support the format for a few years after.

Specifications

The development of the "Compact Disc-Interactive" (CD-i) format started in 1984, two years after the introduction of the Compact Disc. Philips and Sony, two major electronics companies, first announced the format at Microsoft's CD-ROM Conference in Seattle in March 1986. Microsoft's CEO, Bill Gates, was not aware of the format's development before the announcement. The Green Book, officially called the "CD-i Full Functional Specification," described the format for interactive, multimedia compact discs designed for CD-i players. The Green Book also outlined a complete set of hardware based on the Motorola 68000 processor family and an operating system named CD-RTOS, which was based on OS-9 from Microware. Initially, the standard required permission from Philips to use, but the 1994 version was made freely available by Philips.

CD-i discs follow the Red Book specification for audio CDs (CD-DA). The program area of a CD-i disc can include CD-DA tracks or CD-i tracks. However, the first track must always be a CD-i track, and all CD-i tracks must be grouped together at the beginning of the program area. CD-i tracks are organized using the CD-ROM XA specification (with Mode 2 Form 1 or Mode 2 Form 2), and they are classified as "data," "video," "audio," "empty," or "message." "Message" sectors contain audio warnings to inform users that a track is a CD-i track, not a CD-DA track. The CD-i specification also includes a file system similar to (but not compatible with) ISO 9660, along with required files for CD-i compatibility. Compared to the Yellow Book (CD-ROM standard), the Green Book CD-i format solves timing issues by combining audio and video information on a single track.

The CD-i format quickly attracted interest from major manufacturers, including Matsushita. Although a collaboration, Philips eventually took control of most CD-i development, replacing Sony's role. Philips spent millions of dollars creating CD-i titles and players. The format was first called "CD-I" but was later renamed "CD-i" in 1991 with a lowercase "i."

The CD-i Ready format is a bridge format designed by Philips. It allows discs to work on both CD Digital Audio players and CD-i players by placing CD-i software and data in the pregap of Track 1.

The CD-i Bridge format, described in Philips' White Book, is a transitional format that enables bridge discs to be played on both CD-ROM drives and CD-i players.

The CD-i Digital Video format was introduced in 1993. It included movies playable on CD-i players with a Digital Video Cartridge add-on. This format was not compatible with Video CD (VCD), but some CD-i units with the DVC could play both. Only about 20 movies were released on the format, and it was discontinued in 1995 in favor of VCD.

Commercial software

CD-i software was usually created using special tools from two companies: OptImage, which provided the Balboa Runtime Libraries and MediaMogul, and Script Systems, which made ABCD-I. Much of the CD-i software was promoted or published by American Interactive Media (AIM), a partnership between Philips and its company PolyGram, started in Los Angeles in 1986 to create CD-i consumer software. Philips Interactive Media was also started in Europe.

Philips first introduced CD-i as a product for families and did not focus on video games to avoid competing with game consoles. Early CD-i releases included educational, music, and self-improvement programs, with few games. Many of these games were based on board games, such as Connect Four. However, the system had difficulty competing with low-cost personal computers, and games became its most popular software. By 1993, Philips encouraged developers who made MS-DOS and console games to create titles for CD-i. They also released a $250 device that added more memory and supported full-motion video, and they added a second controller port to new consoles for multiplayer games.

Efforts to make CD-i successful in the video game market were not very effective, as the system was designed mainly for multimedia playback and had less power than other gaming systems. Some well-known CD-i games included titles from Nintendo franchises, though not made by Nintendo, such as Hotel Mario for the Mario series and three games for The Legend of Zelda: Zelda: The Wand of Gamelon, Link: The Faces of Evil, and Zelda's Adventure. These games were possible because of a previous agreement between Nintendo and Philips to create a CD-based add-on for the Super Nintendo Entertainment System, which was never completed. However, the agreement allowed Philips to make games using Nintendo characters.

At CES 1992, many full-motion video games were released, including Dragon's Lair and Mad Dog McCree. One of these, Burn:Cycle, is considered one of the better CD-i games and was later released for personal computers. Electronic Gaming Monthly noted that CD-i’s ability to play full-motion video was its strongest feature, but most games required an MPEG upgrade card to use this feature.

Philips also made CD-i versions of popular TV game shows, such as Jeopardy! (hosted by Alex Trebek), Name That Tune (hosted by Bob Goen), and two versions of The Joker's Wild (one for adults with Wink Martindale and one for children with Marc Summers). All North American CD-i games, except Name That Tune, had Charlie O'Donnell as the announcer. The Netherlands released its own version of Lingo in 1994.

In 1993, American musician Todd Rundgren made the first fully interactive music CD for CD-i, called No World Order, which allowed users to customize more than 15,000 details. A Dutch music group, 2 Unlimited, released a CD-i compilation album called Beyond Limits (1994), which included regular CD tracks and special CD-i-only content.

CD-i had many children’s educational and entertainment titles, such as Busytown and The Berenstain Bears. By mid-1996, the CD-i software market in the United States had stopped growing, though Philips kept making titles in Europe. Philips then focused on using CD-i for kiosks and industrial multimedia projects.

Later, independent developers created new CD-i games, including Frog Feast (2005), Super Quartet (2018), and Nobelia (2022).

Player models

CD-i compatible models were sold in Belgium, Canada, France, Germany, Hong Kong, Luxembourg, the Netherlands, Japan, Singapore, the United Kingdom, the United States, and the former European Eastern Bloc. Before it was stopped, reports said it would be sold in Brazil, India, and Australia in the "coming months," with plans to also sell it in China, South Africa, Indonesia, and the Philippines.

In addition to models for regular customers, professional and development CD-i players were sold by Philips Interactive Media Systems and its partners. The first CD-i system, made with Kyocera, was introduced in 1988 as the Philips 180/181/182 modular system. In the United States, many players were sold under the Magnavox brand, which was owned by Philips.

Philips released several CD-i player series for different markets:

• 100 series: The modular 180/181/182 system, first shown at the CD-ROM Conference in March 1988. Designed for professional use.
• 200 series: Consumer models like the 205, 210, and 220. Sold widely through home electronics stores. In the U.S., the 205 was called the 910 when released in December 1991. It originally cost about $799 (equivalent to $1,889 in 2025), later reduced to $599 (equivalent to $1,374 in 2025).
• 300 series: Portable players such as the 310, 350, 360, and 370. Used for professional purposes, not sold to regular customers. Often used for multimedia presentations.
• 400 series: Affordable models like the 450, 470, and 490. Targeted at console and education markets. The CDI 450 was made for gaming and did not include a standard infrared remote. This series was introduced at the Consumer Electronics Show (CES) in Chicago in June 1994. The 450 sold for ƒ 799 in the Netherlands.
• 500 series: Included the 550, which worked like the 450 but came with the normally optional MPEG video cartridge. Also introduced at CES Chicago in June 1994.
• 600 series: High-end professional models like the 601, 602, 604, 605, 615, 660, and 670. Supported extra devices like floppy disk drives and keyboards. Used for software development and testing.
• 700 series: Included the 740, a limited-edition model with advanced features like an RS-232 serial port.

Other CD-i-compatible systems included hybrid devices such as the FW380i, a mini-stereo system with a built-in CD-i player; the 21TCDi30, a television with CD-i functionality; and the CD-i/PC 2.0, a CD-i module with an ISA interface for IBM-compatible 486 PCs.

• Three-unit 180/181/182 professional CD-i system
• Philips CDI 210
• CDI 550 with its heavily criticized paddle controller

Besides Philips, other companies made CD-i players, some of which were sold for years after Philips stopped making the format. These included:

• Bang & Olufsen: Produced the BeoCenter AV5, a high-end TV with a built-in CD-i player, sold from 1997 to 2001.
• Digital Video Systems
• Grundig
• GoldStar (later LG Electronics): Released the GDI-700, a professional CD-i player with a Motorola 68341 processor for faster performance than Philips models. Also made portable units, including a compact version without an LCD screen.
• International Interactive Media (I2m): Released a CD-i PCI expansion card in 1995 for use with 486 and Pentium PCs, as well as 68k- and PowerPC-based Macintosh computers.
• Kyocera: Made the portable Pro 1000S model.
• Manna Space: A Japanese travel agency that sold CD-i players based on the Magnavox or GoldStar versions of the Philips CDI 450 in 1995.
• Maspro Denkoh: Released a GPS car navigation system with an integrated CD-i player in Japan in 1992.
• Memorex
• Nippon Broadcasting System (NBS)
• Saab Electric
• Sony: Released two CD-i models under the "Intelligent Discman" brand. These were portable players for professional use, sold between 1990 and 1991.
• Vobis Highscreen

Before the CD-i format was sold to the public, other companies showed interest in making players or developed prototypes that were never released. These included Panasonic (originally a major supporter of the format), Pioneer, JVC, Toshiba, Epson, Ricoh, Fujitsu, Samsung, and Yamaha. Additionally, Sanyo displayed a prototype portable CD-i player in 1992.

TeleCD-i and CD-MATICS

In 1992, Philips recognized the increasing need for networked multimedia among marketers and partnered with CDMATICS, a company based in Amsterdam, to create TeleCD-i (also called TeleCD). This system connects a CD-i player to a network, such as phone lines or the Internet, allowing data communication and the presentation of videos, images, and other media. Dutch grocery store Albert Heijn and mail-order company Neckermann were among the first to use TeleCD-i, creating successful applications for their home-shopping and home-delivery services. CDMATICS also developed a special tool called the Philips TeleCD-i Assistant and software to help the global multimedia industry create and use TeleCD-i. TeleCD-i was the first networked multimedia application in the world when it was first introduced. In 1996, Philips bought the rights to the source code from CDMATICS.

CD-Online

Internet services on CD-i devices required the use of a special modem and a disc called CD-Online (called Web-i in the US). Philips first sold this in Britain in 1995 for $150. This service allowed CD-i devices to access the internet using a 14.4k modem. It included online shopping, email, and multiplayer gaming for some games. To use the service, users needed a CD-i player with a DV cartridge and an Internet Starter Kit that cost £99.99 at first. The service was promoted as bringing full internet access to the living room through TV screens. Andy Stout, a writer for the CD-i magazine, described CD-Online as:

The CD-Online service started in the UK on October 25, 1995, and in the Netherlands in March 1996 (costing 399 guilders) and Belgium. It was planned to launch in the US as Web-i in August 1996. The website cd-online.co.uk for the UK service stopped working in 2000. The Dutch site cd-online.nl stopped updating but stayed online until 2007.

Only one game, RAM Raid, a first-person shooter, supported CD-Online. Players from around the world could play together if they had the game.

Reception and market performance

Philips invested a lot of money in the CD-i format and system. It was often compared to the Commodore CDTV, which combined a computer, CD, and television into one device. The product was described as a single machine for home entertainment that connected to a standard TV and used a regular remote control. However, the format was also used for other purposes, such as travel, tourism, and the military. In 1990, Peugeot used CD-i for a point-of-sale application to promote its new 605 car. At the same time, Renault used CD-i for staff training, and Japan’s Ministry of Trade and Industry used it for an exhibition. A Philips executive, Gaston Bastiaens, said in 1990 that CD-i would become the main medium for entertainment, education, and information in the 1990s. Sony released three portable CD-i players in June 1990, calling them “picture books with sound.”

The CD-i format generated a lot of interest when it was first announced in 1986, especially in the United States and Japan, because of the popularity of CDs. However, repeated delays in releasing the hardware caused interest to decline. For example, the hardware was originally supposed to be ready by Christmas 1987 but was not. Electronic Arts was excited about CD-i and created a division to develop video games for the format, but it stopped working on these projects when CD-i players were finally released. Meanwhile, a competing format called Digital Video Interactive (DVI) gained attention in 1987 because it used full-screen, full-motion video (FMV) on an IBM PC. Philips and Sony tried to add FMV to CD-i, which caused more delays. At the same time, the CD-ROM standard, supported by Microsoft, improved and solved video playback problems that CD-i had. By 1991, when CD-i players were finally released to consumers, CD-ROM was already well-known and widely used. Ron Gilbert, a game developer, said in 1990 that CD-i had great specifications, but the machines were not available yet. He noted that if CD-i had been released four years earlier, it might have been popular, but by 1990, it was already outdated. Other issues included the lack of FMV at launch, the use of an outdated processor, the OS-9 software, and a high price.

Although Philips promoted CD-i heavily in the United States, by August 1993, Computer Gaming World reported that people were still unsure about its future compared to other systems like IBM PCs, Apple Macintosh computers, and the Sega Genesis. In January 1994, the magazine said that despite Philips’ focus on games, CD-i was not a good choice for serious gamers, though it might still surprise people later. It recommended CD-i with a video cartridge for those needing a new console because of its price and software support, but suggested waiting for the 3DO Interactive Multiplayer if possible. In August 1994, Electronic Entertainment noted that CD-i, along with the Atari Jaguar, had weak game libraries compared to the newly released Sega CD.

By 1994, CD-i was outsold by cheaper multimedia PCs, so Philips tried to position it as a game console, but this did not help. In early 1995, GamePro said that inconsistent game quality made CD-i less competitive with other systems. In late 1995, Next Generation criticized both Philips’ marketing and the hardware itself, saying CD-i was only good for FMV with an expensive add-on cartridge. The magazine noted that although Philips had not officially stopped selling CD-i, it was effectively no longer in use, as no CD-i hardware or software was displayed at the 1995 Electronic Entertainment Expo. Next Generation gave the console a one-star rating. In 1995, the development of DVD-Video, which promised better video quality than CD-i’s Video CD (VCD) format, hurt Philips’ efforts. Philips Media moved its CD-i operations from Los Angeles in March 1996, and by October 1996, the company was ready to stop selling CD-i in the United States.

In October 1994, Philips reported that 1 million CD-i units were sold worldwide. In 1996, The Wall Street Journal said that 400,000 units were sold in the United States. In the Netherlands, about 60,000 CD-i players were sold by the end of 1994. Despite Philips’ marketing efforts, including infomercials, consumer interest in CD-i games remained low. By 1994, sales of CD-i systems slowed, and the product was discontinued in 1998. Plans for a second-generation CD-i system existed, and Argonaut Software was chosen to design its hardware. However, Philips’ president, Cor Boonstra, saw no future for CD-i in media and sold the company’s assets, including its media subsidiary Polygram.

The Dutch part of Philips Media was sold to Softmachine, which released The Lost Ride as the last CD-i game. The French part of the company, which had bought German publishers Bomico Entertainment Software and Laguna Video Games the year before, was sold to Infogrames in June 1997, along with the entire CD-i library and German publishers. A CD-ROM add-on for the Super NES, planned with Nintendo in 1991, was never made. The last CD-i game, Solar Crusade, was released in 1999 by Infogrames.

After CD-i was discontinued, critics strongly criticized its graphics, games, and controls. Microsoft’s CEO, Bill Gates, admitted that he was initially worried about CD-i because of Philips’ support for it, but later said it failed in both the gaming and PC markets. CD-i’s controllers were ranked the fifth worst by IGN and the system was listed as one of the worst consoles by PC World, GamePro.com, CNET, and GameTrailers.

In later years, CD-i became known for its poorly received games, especially those based on Nintendo’s Mario and The Legend of Zelda franchises. Games like Hotel Mario, Link: The Faces of Evil, Zelda: The Wand of Gamelon, and Zelda’s Adventure were heavily criticized. Electronic Gaming Monthly’s Seanbaby called The Wand of Gamelon one of the worst games ever. However, Burn:Cycle was praised by critics and is often considered the best CD-i game.