Radical Entertainment is a video game developer which creates and develops games for all current and next generation platforms. Each year, computer games become graphically more realistic due to advances in computer technology and animation. The object of this project is simulation of deformable objects (such as a mattress or jelly-like substances) in real-time for computer gaming purposes. The equations of motion for such objects is quite different and more difficult to solve than those used for rigid bodies. We will research the existing models used in computer graphics, implement some of the promising techniques and compare them to the simple method of simulating deformable objects by particle systems.