Mobile game

• 1. Introduction

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  Mobile games now account for 49% of total global gaming revenue, making them the single largest sector of the video game industry. That share did not appear overnight. It was built on decades of incremental hardware advances, shifting business models, and a handful of titles that each changed what players expected a game to be. The story starts not with a smartphone but with a Tetris variant on the Hagenuk MT-2000 in 1994, before most people had ever held a mobile phone. How did a tiny game on an obscure German handset set in motion an industry worth tens of billions of dollars a year? And why did the arrival of Apple's App Store in 2008 prove to be the turning point that rewrote every rule about how games are sold?

• 2. Snake and Early Platforms

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  Nokia launched Snake in 1997, pre-installing it on most of its devices. At its peak, Snake was recorded on 350 million devices worldwide. No other game had ever reached that many people through a single distribution channel. The feat was possible because mobile phone ownership was becoming near-universal in industrialized countries, driven by falling handset costs and the establishment of common industry standards.

  Japan moved faster than anywhere else. In 1999, NTT Docomo launched i-mode, a mobile platform that let users download games directly to their phones. That same year, Konami announced its dating simulation Tokimeki Memorial for i-mode, and both Nintendo and Bandai were working on mobile phone adapters for the Game Boy Color and WonderSwan. By 2001, i-mode had 20 million users and handsets capable of graphics comparable to 8-bit consoles. Taito, Namco, and Hudson Soft were among the publishers bringing arcade ports and 8-bit console games to the platform.

  By the mid-2000s, the Java ME platform had become the common backbone for mobile games, since most devices at the time supported it. Games could be obtained via SMS short codes, downloaded from a PC and transferred over, or pulled directly to the device over GPRS, 3G, or Wi-Fi. The market was large but fragmented, controlled largely by mobile carriers who acted as gatekeepers for distribution.

• 3. The App Store Shift

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  Apple launched the iPhone in 2007 and the App Store in 2008, and the combination remade the market. The iPhone's larger memory, multitasking capabilities, and touchscreen made it well suited for casual games. The App Store was the first mobile content marketplace operated directly by a mobile-platform holder, bypassing the carriers who had previously controlled what games reached consumers.

  In October 2009, Apple added support for in-app purchases. That single feature opened a door that had not existed before. Games like Angry Birds and Cut the Rope began building monetization models that moved away from the traditional premium "pay once" approach. Apple's entry also stabilized the hardware landscape around iPhone devices and Google's Android-based phones, which offered a comparable storefront through Google Play.

  The distribution picture in the United States before the App Store had been dominated by wireless carriers such as AT&T Mobility, Verizon Wireless, Sprint Corporation, and T-Mobile US. In Europe, sales were split more evenly between carriers and independent third-party stores. After the App Store, the mobile OS developers themselves became the primary storefronts, and the majority of games shifted to being distributed through them.

• 4. Freemium and the Whale Economy

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  Candy Crush Saga and Puzzle and Dragons arrived in 2012 and introduced a mechanic borrowed from social-network games like FarmVille: a stamina or energy system that limited how many times a player could play in a single period. Players could wait for stamina to restore or pay via in-app purchase to keep going immediately. The model brought millions of players to both titles and millions of dollars in revenue, establishing what became known as the freemium approach.

  As developers studied their player bases, a pattern emerged. The bulk of players spend nothing. Revenues are generated by a small fraction, typically under 10% of total players. Most of that revenue comes from roughly 2% of players who routinely spend large amounts. These high-spending players are known colloquially as whales, a term borrowed from casino culture. Games that encourage teamwork through clans or cooperative play have been found to increase spending among engaged players by raising the social stakes of progress.

  Total global revenue from mobile games was estimated at $2.6 billion in 2005. By 2008 it had risen to $5.8 billion. In 2012 the market reached $7.8 billion, driven by rapid expansion particularly in Japan, China, and the United States. Mobile gaming revenue reached $50.4 billion in 2017, representing 43% of the entire global gaming market. A November 2015 report found that 1,887 app developers were on track to earn more than one million dollars each through the Google and iOS stores that year alone.

• 5. Beyond the Phone

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  Calculator gaming predates mobile phones as a gaming platform by over a decade. In 1980, Casio's MG-880 pocket calculator shipped with a built-in game essentially cloning Space Invaders, released that summer. That same October, the magazine BYTE published a type-in program called Darth Vader's Force Battle for the TI-59, and a version of Hunt the Wumpus for the HP-41C. Limited program address space and the difficulty of storing programs kept calculator gaming rare even as programmable calculators became cheaper through the 1980s.

  The early 1990s changed that. Graphing calculators became powerful and affordable enough to be standard equipment for high school students. Calculators like the HP-48 and TI-82 could run games programmed in RPL, TI-BASIC, assembly, or even C. By 1993, a version of Lemmings had been released for the HP-48. A Doom port for the same calculator followed in 1995. Some titles caused controversy when students played them in class; Dope Wars was a notable example.

  The TI-83 Plus and TI-84 Plus series, among the first TI graphing calculators to natively support assembly, prompted a new wave of development. These calculators run on a Zilog Z80 processor, and assembly remained the preferred language. For calculators based on the Motorola 68000, such as the TI-89, C programming using TIGCC began displacing assembly. Because calculator games require no outside tools to develop, they have survived even as mobile phones became dominant.

• 6. Location, Reality, and Purpose

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  Pokémon Go launched in 2016 as both the most successful location-based mobile game and the most prominent example of augmented reality in the medium. Players travel to GPS-marked locations and can switch on an augmented reality mode that overlays Pokémon creatures onto the live camera feed. The game integrates the player's physical position as a core mechanic rather than as a novelty layer. Earlier location-based games, such as BotFighters from 2001, had explored similar territory but remained closer to research prototypes than commercial products.

  Augmented reality on mobile works by reading the device's camera feed and rendering computer-generated graphics atop the captured image. The system recalculates the rendering as the player moves, keeping the virtual elements anchored to the background. Since Pokémon Go, significant AR mobile game successes have been rare. Microsoft shut down Minecraft Earth and Niantic closed Catan: World Explorers; as of January 2022 the AR category had not produced another breakout title.

  A separate category of mobile games serves explicitly non-entertainment purposes: speech-language pathology, children's rehabilitation in hospitals, habit formation, memorization, and language learning. The line between these purposeful games and gamified apps, which apply game mechanics to non-game tasks, is often blurred. The mobile platform's near-universal household presence in developed countries has made it the natural delivery mechanism for this kind of application.

• 7. Industry Impact

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  Mobile gaming drew players away from dedicated handheld consoles in measurable ways. Both Nintendo and Sony recorded major sales drops in their eighth-generation handhelds compared to their seventh-generation predecessors, a decline attributable directly to mobile competition.

  At the same time, mobile gaming gave rise to microconsoles: low-cost, low-powered home consoles running mobile operating systems. These devices exploited the large library of games already built for mobile platforms and brought them to the television screen at a fraction of the cost of traditional consoles.

  Over 90% of smartphone users play a mobile game at least once a week. Ownership of a smartphone alone increases the likelihood that a person will engage with mobile games. Games like Flappy Bird and Doodle Jump are distributed free to users but carry paid advertising, illustrating how advertising-supported distribution became one of several revenue models running simultaneously in the same market. Among the developers who built businesses within this ecosystem, Gameloft and King are among the most prominent publishers.