The Gates of Thralldom
Considerations for a Sandbox-Hexcrawl game
Sandbox and hexcrawl games do not flow like most RPGs of today. Because you can choose to go anywhere, you cannot assume that every area is level-appropriate for you. Some areas you may wish to mark on your map and come back to later.
While playing a module it is safe to assume any foes you come against are meant for you to overcome, you cannot make that assumption in a sandbox game. Be prepared to sneak around, talk your way around, or even run away from some obstacles!