First freeform 3D action-adventure videogame

First freeform 3D action-adventure videogame
Who
Mercenary
Where
()
When
1986
The earliest action adventure video game to offer players an open-ended 3D gameworld was Mercenary, published in 1986. The aim of the game is to escape from the planet Targ, and the player is allowed to choose the best way to achieve this goal.