Why a game is not just a file
A book from a century ago can usually be read by anyone who can read the language. A video game is different. It is software written for a specific machine, often stored on a specific kind of medium, and sometimes dependent on services run by a company that may no longer exist. To play it, you typically need the code, the hardware (or something imitating it), the controls and sometimes the original screen. If any one of these goes missing, the game can become hard or impossible to experience as it was.
Game preservation is the effort to prevent that. It is a mix of technical work, legal questions and plain record-keeping, and each part has its own difficulties.
Hardware decay
Old consoles, computers and arcade boards are physical objects, and physical objects age. Some common problems are:
- Electronic parts wearing out. Components such as capacitors can degrade over time, and a machine that sat in storage may fail when switched on again. Repair is sometimes possible, but replacement parts are not always available.
- Storage media breaking down. Magnetic media such as floppy disks and tapes can lose data as the material deteriorates. Optical discs can also suffer damage, and some collectors report discs becoming unreadable, although how often and how fast this happens varies with manufacturing and storage conditions.
- Batteries inside cartridges. Some cartridges used a small battery to keep saved progress in memory. When the battery runs out, the save data may be lost. The game itself may still work, but the progress stored on it does not.
- Custom chips. Many systems used chips made for one purpose. Once a chip fails, there is often no standard substitute.
Because every copy is aging, preservation tends to focus on making a faithful digital copy of the contents rather than relying on the original object lasting forever.
Lost source code and assets
Players see the finished game, but developers work from source code, art files, audio and tools. After a game ships, those materials are sometimes not kept in an organised way. Studios close, merge or change hands, hard drives are reused, and archives are thrown out during moves. The result is that for some older games the original source may no longer exist anywhere accessible.
This matters because source code makes it far easier to fix bugs, adapt a game to new systems or study how it worked. Without it, people have to work from the released version alone, picking apart the finished program. The same issue affects the tools used to build the game, since a project may only open in software that itself no longer runs. Game development produces many such files over the years it takes to finish a title.
Formats that vanish
Even when data survives, the way it is stored can become unreadable. Early games used many different file layouts, compression schemes and copy-protection tricks. Some used media that few drives can still read. Over the decades, game media formats have changed from cartridges to discs to downloads, and each change left some older material behind.
Software platforms are another case. Games built on technology that was later discontinued, such as certain browser plug-ins, can stop running when the platform is switched off. Many browser games fell into this group when the plug-in they relied on was retired at the end of 2020.
Copy protection adds a further layer. Techniques meant to stop piracy sometimes depend on a particular disc drive, a physical key, or a check with a server, and those can interfere with making or running a working copy later.
Legal and ownership barriers
Games are creative works protected by copyright, usually for a very long time. That creates a tension. Preserving a game often means copying it, and sharing it so others can play it means distributing it. In many countries, the law gives libraries and archives only limited room to do this, and the rules differ from place to place. Ownership can also be unclear: when a company is sold or dissolved, nobody may know who holds the rights to an old title, or the rights may be split between a developer, a publisher and the owners of licensed music or characters.
Licensed content is a particular problem. A game may include songs, brand names or a film tie-in that were only licensed for a limited period, which can make re-releasing it complicated and expensive.
Because of these limits, some institutions can keep a game safe but are not permitted to let the public play it freely. That is part of what video game museums and archives deal with in practice.
Games that need servers
A growing share of games depend on online services for matchmaking, accounts, downloads or even basic features. When the company turns those services off, the game may stop working even though every file is intact. This is one of the hardest preservation problems, because a server is not something that can be placed on a shelf. Server shutdowns are one of the most common ways an otherwise intact game stops working. A related issue is that games bought digitally can be removed from sale, which affects who can still get them; delisted games are covered separately.
Why the picture is incomplete
Preservation is not evenly spread. Popular titles from big publishers are more likely to be kept, re-released or documented. Smaller games, regional releases, prototypes, unreleased builds and local arcade hardware are more likely to be lost. People who study the field often point out that it is hard to say exactly how much has been lost, because nobody has a complete list of everything that was ever released. Any claim about the exact percentage of lost games should therefore be treated with caution.
What helps
No single approach solves everything, so preservation usually combines several:
- Making verified digital copies of media, and storing them in more than one place.
- Documenting how hardware and software behaved, not just keeping the files.
- Using game emulation to run old software on current machines.
- Official re-releases, which are covered when comparing remakes, remasters and ports.
- Collecting manuals, packaging, design documents and interviews so the context survives alongside the code.
- Keeping some original hardware working, since imitations can only be checked against the real thing.
None of these is perfect on its own. A re-release may change the game; a copy may be hard to share legally; an original machine will keep aging. The practical goal is to reduce the chance that any one failure ends the game’s history.