free-roaming

adjective3

1. •
   Having the ability to move about unconstrained by reins, leashes, fences, cages, barns, and so on.

   • From the distance of today, my guess is that it was the free-roaming horses that had most to do with the increase in carnivores, mainly because nobody was trying to protect them. — 2001
2. •
   Not orbiting a gravitational center.

   • Microlensed double-image quasars have sent a consistent message that the baryonic dark matter consists of a dark population of free-roaming planet mass objects. — 2005
3. •
   Allowing the player to move freely through a virtual world or choose the game narrative and objectives at will; an open world.

   • While Metroid introduced multiple endings to a linear game, other more recent designs have presented free-roaming worlds incorporating multiple gameplay paths. — 2009