What's all thcraze about DPI? I use a mouse that's just been labelled "SONY", nothing else, how do you check how many DPI it has? Regardless of this, I've completed lots of games using this mouse, games like Call Of Duty 4, Left 4 Dead, Prince Of Persia (all of them), F.E.A.R 2, S.T.A.L.K.E.R: Shadow Of Chenobyl... The list is endless... The price was around $4. I bet I can complete even the most complex games on this Razor mouse in one go...