you need directx, and a min of a 500mhz pc, with more than 256 ram. at least that's what it was when i checked it out last. for the life of me though, i cannot understand how they squeezed 1.9 gigs of textures and sound into 60 kb..... and if that's possible, why aren't game creators taking notice? (hint nintendo) Using fractals & other mathmatical algos to produce the textures, I imagine.