VivoosVROpen is an open source project aiming to develop scientifically tested VR Based Phobia Therapy tools. It is based on prior work carried out by Ideasis Ltd, Ankara, TURKEY. The prior work was supported under multiple R&D grants by TUBITAK and the current source work for 2018 is supported by UNICEF Innovation Fund. The open source license is BSD-license, due to the fact that Unreal based VR apps can not be GPL'ed. The project is open to all kinds of contributors worldwide, from psychology and psychiatry experts to VR developers.