This is Larian's first Xbox release, with Divine Divinity and Beyond Divinity being PC only. The PC and Xbox versions of D2:ED / DKS were developed in parallel; neither was a port.
and to keep Steam from opening up a direct link to their forums in cowardly at best.
And how did Larian keep Steam from linking to the forum? The reference to Steam that you quoted was about Larian getting them to fix a problem where a discount was not being applied properly for people buying DKS who had also bought D2:ED through Steam.
