The SCORE (Study for a Cosmic ORigin Explorer) project aims at opening up a new energy window in gamma-ray astronomy. Using a large instrumented area of 10 km2 to 100 km2 it is possible to obtain good event statistics up to primary gamma photon energies of several PeV. This large area can be achieved by using a distributed network of small and simple detector stations with a station spacing of about 100 to 200 meters. Each individual station will consist of four photomultiplier tubes looking towards the zenith with Winston Cones on top to increase the sensitive area to about 0.5 m2 per station. The array will sample the Cherenkov light front generated by extensive air showers (non-imaging technique). Apart from gamma ray astronomy in the energy range of 10 TeV to the mid-PeV region this instrument can be used for cosmic ray physics (anisotropies, spectra, composition) up to energies of several EeV as well as fundamental astroparticle research. In this contribution we will present the event reconstruction algorithm for SCORE and its power in terms of angular resolution, energy resolution, shower depth estimation and gamma / hadron separation. The results are used to calculate the expected sensitivity of the instrument. Furthermore, preliminary results of a campaign to find a suitable site for the detector array will be presented.