Tekken 4 introduced significant new gameplay changes from the previous games in the series. For the first time, it allowed players to maneuver around an arena interacting with walls and other obstacles for extra damage. These "environmental hazards" in turn allowed players to juggle opponents for consecutive combos and allowed the designers to implement a "switch maneuver", which let players escape from cornering and throw the tide in their favor. The game engine had been tweaked to be more focused on the environment, causing the characters to move more slowly and fluidly than in Tekken Tag Tournament. Finally, the game introduced a brand new graphics system, that featured increased lighting, dynamic physics, and smoother surfaces.