Having the ability to move about unconstrained by reins, leashes, fences, cages, barns, and so on.
Allowing the player to move freely through a virtual world and/or choose the game narrative and objectives at will; Open World.
Not orbiting a gravitational center.
Prone to roaming around.
Slender and long of limb; lanky
Having or permitting range or scope; roomy; commodious.