How about going into a complete MMORPG directly from your browser without any installation or download, but still having your adventure available whenever you want? This is exactly what Ember Sword is ...
One ‍ ‌‍ ‍‌ ‍ ‌‍ ‍‌ could almost visualize the act of jumping straight from a browser into a fully developed MMORPG without any installation or download—a mere on-demand adventure of the purest kind.