Online sports games refer to sports video games that are played over some form of a computer network, most commonly played on the Internet.

Online sports games started in the 1980s with MUDs, simple multiplayer text-based games, often played on a BBS using a modem.

As the World Wide Web developed and browsers became more sophisticated, people started creating browser games that used a web browser as a client. Simple single player games were made that could be played using a web browser via HTML and HTML scripting technologies (most commonly JavaScript, ASP, PHP, and MySQL.

You can play multi-player bowling game on candystand, which was a pioneer for sports games.

Many consider fantasy football to be an online sports game.

Advances in browser-based technologies have allowed the creation of browser-based MMORPGs, using similar as other browser-based games.

Due to current technology limitations, browser based games cannot bring the same graphical or sound quality that custom-client MMORPGs can. Browser-based MMORPGs tend to be a little cheaper than full-blown MMORPGS.

Online sports games are one of the most popular types of online games.