RuneScape

From Wikipedia:

RuneScape is a fantasy massively multiplayer online role-playing game (MMORPG) released in January 2001 by Andrew and Paul Gower, and developed and published by Jagex Games Studio. It is a graphical browser game implemented on the client-side in Java or HTML5, and incorporates 3D rendering. The game has had over 200 million accounts created and is recognised by the Guinness World Records as the world's largest free MMORPG and the most-updated game.

Methods to Play

Rsu-client (Recommended)

Note: If you are unable to install the client from the AUR because of a problem with perl-wxAUR, remove it from the depends array. perl-wxAUR is needed for the GUI. The client will work fine without it, but you will not have a GUI.

Rsu-client is an unofficial RuneScape Unix/Linux Client and it's currently the recommended way to play RuneScape/Old School RuneScape. It's available to install from the AUR unix-runescape-clientAUR, or you can manually grab the source at https://github.com/HikariKnight/rsu-client. After installation, to start playing, open either “RuneScape” or “RuneScape OldSchool”, depending on what version you are interested in.

HTML5 RuneScape 3 Beta Client

There is an official HTML5 webclient available for RuneScape which can be used in your browser of choice. RuneScape cannot be played with google-chromeAUR/chromium because they no longer support the Java plug-in required for the client. As the client is currently in beta and still being optimized, it's liable to crashes and bugs, please take additional care during challenging gameplay that could result in the loss of your items. More information and about browser support can be found at: https://www.runescape.com/browser-support

OSBuddy (Old School RuneScape only)

OSBuddy is a third-party toolkit for Old School RuneScape which in addition to a client offers useful features, such as highscores, notes, price checker etc. It's available for installation from the AUR, osbuddyAUR. More information and about the toolkit can be found at: https://rsbuddy.com/osbuddy/