Game demo

• 1. Introduction

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  A game demo is a trial version of a video game, limited either by time or by how far a player can progress. Long before streaming, subscriptions, or free-to-play models existed, demos were the primary way curious players could sample a game before handing over their money. How did a plastic disk stuffed in a rack at a retail store become one of the most influential ideas in gaming culture? And what happened when the Internet arrived and changed everything?

  The answers involve scrappy startup companies, floppy disks priced barely above free, cover-mounted CDs stuffed into gaming magazines, and a technical distinction between two types of demo that most players never knew existed. The story of the game demo is also a story about trust: between developers and players, between publishers and retailers, and between a medium still finding its footing and an audience hungry to explore it.

• 2. Shareware and the Early Nineties

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  Apogee Software, now known as 3D Realms, was one of several then-fledgling companies that built their early businesses on shareware distribution in the early 1990s. Epic MegaGames, now Epic Games, and id Software were among the others. Shareware gave consumers the chance to play a trial portion of a game, typically the complete first section or episode, before committing to a purchase.

  Physically, these shareware titles lived on single floppy disks, first the five-inch variety and later the 3.5-inch format, displayed in racks at stores and sold for very little money. Because the shareware version was essentially free, the price only needed to cover the disk itself and minimal packaging. Some developers tucked demo disks inside the box of another game from the same company, bundling exposure with each sale.

  Shareware was also the distribution method of choice for the early wave of modern first-person shooters, a genre that would later reshape the entire industry. By the mid-1990s, however, games had grown too large to fit on floppy disks, and that original shareware model began to give way to something new.

• 3. Shareware Versus Demo

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  There is a precise technical difference between shareware and what most people today call a demo, and it matters more than it might seem. Up to the early 1990s, a shareware release could be upgraded to the full game simply by adding the remaining episodes or portions; crucially, the existing shareware files stayed intact. A demo, by contrast, is a self-contained program that cannot be upgraded.

  The game Descent and its sequel illustrate this clearly. Players who used the Descent shareware could keep their saved games when they purchased the full version. Players who tried the Descent II demo had no such luck; the demo and the full release were entirely separate programs.

  This distinction shaped what players could reasonably expect from a trial version. Shareware rewarded early adopters with continuity. Demos offered a glimpse and then a clean break, asking the player to start fresh.

• 4. Magazines, CDs, and Cover Disks

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  As floppy disks became impractical for larger games, gaming magazines stepped in as a distribution channel. Demos were offered free on CDs or DVDs bundled with magazine issues, and some demos became exclusive to specific publications. In the United Kingdom and mainland Europe, cover tapes and disks had been a common practice throughout the 1980s and 1990s.

  That tradition gradually faded as demos grew larger and broadband Internet spread more widely. Magazines that had once competed partly on the strength of their cover disk eventually shifted focus toward full games rather than previews.

  At retail stores, non-playable demos were also a fixture, often displayed alongside playable ones on kiosk machines. Console manufacturers added their own variation: a demo disc packaged with new hardware, offering playable previews of upcoming games to buyers who had just invested in the system.

• 5. Playable Versus Non-Playable

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  Game demos split into two distinct categories: playable and non-playable, the latter also called a rolling demo. Playable demos generally replicate the full game's mechanics while restricting how far the player can go, occasionally disabling advanced features. Some, however, include content that never made it into the final release, which has made certain demos collector's items in their own right.

  Non-playable demos work differently. They are essentially recordings, either captured video or gameplay rendered through the game's own engine, designed to show off what the software can do. Events like E3 became the natural home for these, displaying early-production technology and gameplay previews to large audiences. Many games also play a demo automatically if the title screen sits idle long enough.

  The format a demo takes depends partly on the platform. Cartridge-based systems rarely offered demos at all, because the cost of duplicating cartridges was prohibitive. Systems built around cheaper media, such as tapes, floppy disks, CD-ROM, or DVD-ROM, could support them far more easily. Today, the Internet has become the primary channel, with nearly all developers and platforms focused on online distribution.

• 6. Genre Rules and Edge Cases

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  Different game genres have developed their own conventions for what a demo should contain. Platform and action games typically show only the first few levels. Adventure game demos tend to be limited to a very small number of rooms, and the save-game feature is usually disabled entirely.

  Sports game demos narrow the field even further, restricting play to an accelerated half or a single match between a small number of teams. That restriction gave rise to a specific practice: demo expanders, programs designed to tweak those locked settings and give players a bit more flexibility within the demo's constraints. Racing game demos follow a similar logic, ordinarily limiting the player to one race in a pre-selected car.

  In some cases, a demo differs noticeably from the equivalent section in the finished game, particularly when the demo is released before the full game is complete. When that happens, what players experience is less a sample and more a snapshot of a game still taking shape.