Many game developers live and die without making a mark on the industry, and others suffer a crueler fate. They peak with brilliant games and then fade away for one reason or another. Markets shift, talent departs, and sometimes, the magically summoned lightning just doesn't strike again. From there, it's a slow descent into mediocrity, accompanied by the laments of former fans and the sense that something potentially brilliant was lost. It's never a pretty sight, and we've dug up some game companies, large and small, that slipped from their high ground.