Jake Sully, a former soldier who was in a wheelchair, is selected to participate in the Avatar program; a project that carries scientific minds about 
GM bodies, so that communication with the natives becomes easier.
If you do like a video game trial, you can go out and buy the full version of the video game.
Clash of Clans will definitely have you staring at your phone constantly waiting to expand and frantically 
hoping you can withstand attack.