Flight sims...the good ones. FSX...XP11...P3d...new Microsoft FS. Use a heinous amount of power. I've netted 3 pc's together to get FSX to run well, with 3rd party programs. But to be fair, they render the whole world....Planco only renders on its maps. Planco is not optimized very well, its the engine they have used. I won't buy Planco for my kids on Xbox until they optimize the PC engine.