Massively Multiplayer Online Sandbox A massively multiplayer online game having primary mechanics based on sandbox games. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)MoreClick to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)Click to email this to a friend (Opens in new window) Related Related Articles: Glossary: MMOS« Back to Glossary Index