Being the grognard that I am, my worst buy was Jutland - there's a decent WW1 naval combat sim in there, but it's buried under a useless, practically non-existent interface, the worst camera controls ever seen, and a pretty stupid AI. Oh, and an UBISoft-worthy DRM scheme on top for extra shitfuckery. Plus when I contacted them for tech support they treated me like a pirate. I blame CSL. Steam and Iron is worlds better. Best non-buy: Hitman, I guess? It's the only game I can think of that I would have been willing to buy based on the strength of its predecessors that turned out to be bad.