This software allows you to create your own games or simulations using different tools that can be downloaded easily for free from their website! The interface could use some improvement but it's not difficult at all once get familiarized with its functions/tools available so I would rate this as very good tool when dealing about building models of any kind which require heavy rendering power like cars racing engines etc. You will save tons of time if compared with other programs out there especially those expensive ones where most people end up spending thousands just because they don't know what else to do aside buying them outrightly.