8. What is a good RPG to play for sessions of 2 hours or less?
[Wherein I give up on picking a single option.]
If you’re going to plan on a 2-hour game, you had better use a streamlined system with rapid character creation. Systems that are well-suited include Fate Accelerated, The Shadow of Yesterday, PDQ, Wushu, Over The Edge, etc.
Fate Accelerated
Over the Edge
The Reef 