Steam

Steam is an online digital distribution service run by Valve Corporation, originally started in 2002 as a way for them to deliver their gaming content direct to consumers, and as a means to automatically provide patches for their games. The first Valve game that required mandatory Steam registration was Half-Life 2. The service was eventually opened up to other publishers and developers. The system caused controversy, as it was the first system whereby a game had to be activated, and this had the knock-on effect of encouraging other publishers and developers to do the same, most notably Electronic Arts, so as to prevent their games from being sold on the second-hand market once purchased and activated.

Because this process of selling and delivering online cut out game store retailers and game publishers, Valve became involved in a legal dispute with Vivendi Universal, their publisher at the time. Vivendi Universal argued that Valve was going against their publishing agreement.

Client Features

The Steam client supports the downloading and launching of games purchased through the Steam Store, and includes support for Downloadable Content (DLC). In a unique move, Steam allows its users individual control over what DLC packs a game runs with; this allows games to be run with certain expansions or content disabled, including content that grants shortcuts to game completion, such as the DLC used in the Saints Row franchise.

Steam also supports cloud saving for supported games, and built-in mod support for supported games via Steam Workshop. The Steam Client is currently available for Microsoft Windows and Mac OS X, with a development release currently available for Linux. Steam is expected to be integral to Valve Corporation's SteamOS.

Search by Features

Currently, many games are available over Steam, and the system has expended in scope enormously in the decade since release. Valve now has several aspects of the Steam service available to third-party developers and publishers. In addition, these and other criteria can be used to search for games. Valve also offers a region-locking service, meaning games purchased in a particular territory many not be playable in others. This system is optional, and Valve itself does not region-lock the games that it offers.

Search by Type

Entries in the Steam Store can be further searched by type:

Games
Videos & Trailers
Demos
Mods
Packs
Downloadable Content
Guides
Software

Search by Tags

Games be also additionally be searched by "Tag", of which can be considered a selection of what genre(s) a game falls into. The following are available:

Action
Adventure
Casual
Free to Play
FPS
Indie
Massively Multi-player
Racing
RPG
Sci-fi
Shooter
Simulation
Strategy

Note: Singleplayer and Multiplayer are also entries in this field, however, this functionality is a duplicate of the next section, and is to be treated as a side effect of the Tagging system being opened up to players to define.

Search by Number of players

Games can also be searched via the type of gameplay they offer with other players:

Co-op
Cross-Platform Multi-player
Multi-player
Local Co-op
Single-player

Search by Languages

Steam supports a number of non-English languages, and allows games to also be searched using this as a criteria. The following are supported to be used in this way: