Proto:S.T.A.L.K.E.R.: Shadow of Chernobyl

S.T.A.L.K.E.R.: Shadow of Chernobyl probably has the most prototypes released of any game out there. Sonic the Hedgehog 2 has nothing on the sheer amount of prototypes that Stalker has. For some reason (which makes it hard to sort these), there are duplicate build numbers, many of which are drastically different to the other ones, as well as some builds with lower numbers coming out after builds with higher ones!