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A multiplayer game is a video game in which more than one person can play the same game at the same time. Unlike most other games, computer and video games are often single player activities because the computing power exists to create artificial opponents. In multiplayer games, players either all compete against each other, called PVP, or team up to achieve a common goal such as defeating an enemy that can consist of either computer or human players. Usually multiplayer games either use computer networking to allow players to play together or require the players to gather around a single game system to play.

Contents

Networked

Online cheating

Single-system

Number of players per console

See also

Networked

In modern computer games, the word multiplayer usually implies that the players play together by connecting multiple computers via a network, usually either a LAN or the Internet. This form of multiplayer is sometimes called "netplay" to refine the meaning. The first popular videogaming title to release a LAN version was Doom in 1993, when the first network version of the game allowed a total of four simultaneous gamers. Networked multiplayer games tend to be most enjoyable when played on a LAN because it essentially eliminates problems common in Internet play, such as lag and rude, anonymous players. This is because it is played over a workspace, house, or other small area and only people directly connected to it can play. As a result, multiplayer games usually are the focus of LAN parties. Play-by-email games are multiplayer games that use email as the method of communication between computers. Other turn-based variations which do not require players to be online at the same time are Play-by-post gaming and Play-by-Internet.
Some online games are "massively multiplayer" games, which means that a large number of players participate simultaneously. The two major genres are MMORPG (massively multiplayer online role-playing game) such as ''World of Warcraft'' or ''EverQuest'' and MMORTS (massively multiplayer online real-time strategy).
Some networked multiplayer games do not even feature a single-player mode. For example, MUDs and massively multiplayer online games, such as RuneScape are multiplayer games by definition. First-person shooters have become very popular multiplayer games and games like ''Battlefield 1942'' and ''Counter-Strike'' gained their fame despite not featuring extensive (or any) single-player plot or gameplay. The biggest Western MMOG in 2007 is World of Warcraft with over 8 million registered gamers worldwide. The biggest MMOG in the world is Lineage out of South Korea with 14 million registered gamers which is played in several mostly Asian countries.
This category of games currently requires multiple machines to connect to each other over the Internet, but before the Internet became popular, MUDs were played on time-sharing computer systems, and games such as ''Doom'' were played on a LAN. ''Spacewar!'', created in 1962 for the PDP-1, is credited with being the first multiplayer computer game.
Gamers often refer to latency by the term ping, which measures round-trip network communication delays (by the use of ICMP packets). For example, a player on a DSL connection with a 50 ms "ping" will be able to react faster to game events than a modem user with 350 ms average latency. Another popular complaint is packet loss and choke, which can render a player unable to "register" their actions with the server. In first-person shooters, this problem usually manifests itself in the problem of bullets appearing to hit the enemy, but the enemy taking no damage. Note that the player's connection is not the only factor; the entire network path to the server is relevant, and some servers are slower than others. While latency is frequently complained about, many players believe a lack of finesse and decent tactics is more damaging than a slow connection in most games. Major and frequent variations in latency, however, can be another story; these can make it very difficult to properly play the game.
Recently, (Dreamcast in 2000) game consoles have also begun to support network gaming, over both the internet and LANs. Many mobile phones and handheld consoles also offer wireless gaming through Bluetooth or similar technologies.

Online cheating

Main articles: cheating in online games

As in all games, some players choose to cheat 2pvp and gain an advantage in online multiplayer games. Often this is done by exploiting bugs or design limitations in the software . Games companies try to prevent cheating in a number of ways. Technologically, they use software such as PunkBuster or RSVP First which continually verifies that the game being played is unaltered. Games companies can also demand a subscription fee for access to the game network which is non-refundable, so they can effectively fine cheaters for cheating. They may also issue "patches" to the users of a certain game (usually via internet download) that effectively fix glitches in the code that cheaters often exploit to their advantage.
Even with the use of anti-cheat software, the FPS games are notorious for having the most cheats, which can sometimes turn people away from that type of game. This may be due in part because both clients and servers are run on private systems instead of on company owned servers. One of the most infamously hacked games is the original Diablo, a role-playing game with an online component. Another game is Aliens versus Predator 2 where hackers change memory variables to alter the game's programming.
Also another common method of cheating is in RTS games, where players are able to unlock game database files, and edit variables in them which often provide infinite amounts of a certain resource, unit, etc. For example, in Age of Mythology, which also suffers from the ajax hack, in which case players spawn the Ajax from the SPC campaign, it is not uncommon to find people exploiting the ESO game system to give them unlimited resources, then attacking before any other player is ready.

Single-system

In modern console games, arcade games, and console-style games designed for home theater PCs, the term multiplayer usually implies that the players play together by using several controllers plugged into the game system and hooked up to a single television monitor. For home console games, developers often use split-screen so that each player can have an individual viewpoint on the action (important for genres such as the first person shooter), although most arcade games and some console games (ranging from the seminal ''Pong'' to the ever-popular Bomberman) make use of a single play area for all the players. Players can also immerse themselves in turn-based "hot seat" console games using a single controller, such as in the ''Worms'' series and perhaps through a game of ''Horse'' in ''Tony Hawk's Pro Skater'' or ''Matt Hoffman's'' BMX spin-off.
As many game consoles now support online or network games, split-screen is often supported ''in combination'' with these multi-system modes. For example, in a network or internet game of ''Halo 2'', up to four players may be playing in split-screen on each console in the network, for a total of 16 players.
Single-system games may also involve several gamers taking turns playing a game on the same system using the same input devices. In PC gaming, a multiplayer game where the players share a computer is usually called hotseat.

Number of players per console

Console gaming systems have historically had two controller inputs. Later generations of consoles allowed for additional controllers to be added using a device such as the multitap. Starting with the release of the Nintendo-64, a minimum of four controller inputs became more standard.
A listing of selected consoles with the number of standard and optional inputs:

Key
+	Optional "multitap" add-on allows additional controllers to be connected to the system.
S	Some games make use of a serial port connecting more than one system.
N	Some games make use of a wired or wireless network connecting more than one system.

★ 3DO (8)

★ Atari (2)

★ Atari Jaguar (2+3+3+3+3+3+3+3+3+3+3 S)

★ Commodore 64 (2+2)

★ Intellivision (2)

★ Nintendo 64 (4)

★ Nintendo Entertainment System (2+2)

★ Nintendo GameCube (4 N)

★ Personal computer with USB hub (4 S N)

★ PlayStation (2+3+3 S)

★ PlayStation 2 (2+3+3 S N)

★ PlayStation 3 (7 N)

★ Sega Dreamcast (4 N)

★ Sega Genesis, Sega CD, Sega Genesis 32X (2+3+3)

★ Sega Master System (2+)

★ Sega Saturn (2+5+5 S)

★ Super Nintendo Entertainment System (2+3)

★ TurboGrafx-16 (1+4)

★ Xbox (4 N)

★ Xbox 360 (4 N)

★ Wii (4 Wii remote + 4 GCN N)

See also

★ Cooperative gameplay

★ LAN gaming center

★ List of gaming topics

★ MMORPG

★ Multiplayer mobile games

★ Multiplayer browser game

★ PlayStation Network

★ Nintendo Wi-Fi Connection

★ Video game center

★ Xbox Live