It allowed in-game characters to wander around the gameworld independently of each other, performing "everyday life" actions, which was not previously possible, and all characters and objects occupied space; consequently, non-player characters had to side-step the player's protagonist and any other object they came across, as well as the player having to side-step them, achieving a more realistic game world that previous engines were unable to provide, though non-player characters could unwittingly block a path as the player was traversing the game scene. Non-player characters performed much simpler tasks with each release due to size constraints.