Time-domain simulation of a floating offshore wind turbine platform subjected to regular wave with a wave height of 10 meter and period of 10.5 second. The geometry is generated based on the OC4 DeepCWind platform as defined in the NREL technical report (Robertson et. al., 2014). Frequency domain coefficients are obtained from the simulation done in Capytaine (Ancellin & Dias, 2019). Platform's responses are modelled according to the Cummins equation (Cummins, 1962). Recursive approach (Sheng et. al., 2015) is used to model the memory effect.