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)Click to share on Google+ (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