2D ENGINE targets new 2D materials phases that do not exist in Nature in bulk but that can be engineered by synthetic techniques in thin film form. The new 2D phases emerge from their 3D polar parent materials with the wurtzite structure and stabilize below a critical thickness (a few ML) as a result of surface energy minimization, adopting a planar non-polar hexagonal (h) BN-like structure. The new materials exhibiting sp² hybridization are expected to have the stability of graphene but also possess a finite energy gap that makes them useful for (opto)electronic devices.  h-AlN 2D dielectric as well as h-GaN and h-SiC 2D semiconductors are targeted with the aim to fabricate functional electronic and photonic devices, first as a means to validate the quality of these materials at the highest possible level, second to show that the new 2D phases could have an impact addressing urgent needs in digital and Si photonics technologies. Moreover, 2D ENGINE aims to show new functionalities such as nanoscale ferroelectricity produced by twisted bilayer h-AlN or h-BN which can lead to ultra-low power ferroelectric tunnel junction memristors for in-memory computing. Apart from the NCSRD coordinator, 6 more beneficiaries participate. One large facility installation (ESRF, France), three Universities (U. Patras, Greece, U. Leiden, Holland and Fritz-Haber Institute-Max Planck Institute, Germany) and two SMEs : (Leiden Probe Microscopy, Holland and AMO GmbΗ, Germany)