Well, they're not compatible with Vista (let alone Vista64) so they're are of little use to me. I really wish Valve would put in a bit of extra effort to ensure legacy games run on Vista (even if it just means putting pressure on the publisher responsible) - the Abe games run on Vista, so there's not really any excuse for these games not to.How do you know they don't run on Vista? Neither Abe game mentions Vista compatibility in the system requirements listed on Steam, and you said that they work with Vista, so isn't it possible the X-Com ones do as well?