You are able to ride vehicles like the lava motorcycle, etc. But your main weapons are your punches, kicks, white eco (at the final boss) , blue eco , orange eco (you can shoot lasers) and i think thats it. There are no specific weapons or guns like in the 2nd or 3rd game like you were asking but still experiment with some things. An example would be that you can run over and kill monsters with vehicles and i think that you can even control a turret in one level . Theres just no specific weapons.