Play online String Theory games for free on vitalitygames.com. String Theory is a first-person puzzle game about gathering brightly colored objects by touching them with things attached to the fishing pole. As more objects are collected, more objects light up. Utilize this ability to reach to the red gate! Play any type of Game at vitalitygames.com. The biggest Game Collection to play free online. Flash, Unity 3D, Html5, Android, Java and Shockwave.