httpv://www.youtube.com/watch?v=HTtzCHVMc0A&feature=player_embedded
Iris Simulations doesn’t produce aircraft for FS only, they are also involved with Digital Combat Simulator.
DCS : World is a free modern combat simulator developed by Flanker and Lock On developers, including the base package scenery, user interface and the SU-25T.
Other modules are developed by Eagle Dynamics or other certified third party developers like IRIS Simulations.