Second Life is not a game. It is a multi user virtual environment that can be used for anything and its users create everything that is there. It is real time, has full audio communication, a very vast landscape, and some incredible simulations that have been built. (The Sistine Chapel is particularly compelling).
There are groups involving almost interest from music to art to teaching and learning. There is a shady side as well. I doubt the graphical processing could be handled on an android device, although I have used it on a netbook- it is iffy there.
Verizon Galaxy Nexus